Firefighters work at a parking lot at the site of explosions at the Binhai new district in Tianjin August 13, 2015. Two massive explosions caused by flammable goods ripped through an industrial area in the northeast Chinese port city of Tianjin late on Wednesday, killing 17 people and injuring around 400, official Chinese media reported. (Photo by Reuters/Stringer)

In this photo taken Thursday, August 13, 2015, a man walks past the charred remains of new cars at a parking lot near the site of an explosion at a warehouse in northeastern China's Tianjin municipality. Rescuers have pulled a survivor from an industrial zone about 32 hours after it was devastated by huge blasts in China's Tianjin port. Meanwhile, authorities are moving gingerly forward in dealing with a fire still smoldering amid potentially dangerous chemicals. (Photo by Ng Han Guan/AP Photo)

People sleep outdoors on slides after explosions hit Binhai new district, Tianjin, August 13, 2015. (Photo by Reuters/Stringer)

A man wears a mask while resting outside after explosions hit Binhai new district, Tianjin, August 13, 2015. (Photo by Reuters/Stringer)

A man checks his mobile phone near overturned shipping containers after explosions hit the Binhai new district, Tianjin, August 13, 2015. (Photo by Reuters/Stringer)

Smoke rises over the site of the explosions at the Binhai new district in Tianjin August 13, 2015. (Photo by Jason Lee/Reuters)

Damaged cars are seen through the damaged window of a building as smoke rises from the debris after the explosions at the Binhai new district in Tianjin, China, August 13, 2015. (Photo by Reuters/China Daily)

Damaged cars are seen as smoke rises from the debris after the explosions at the Binhai new district in Tianjin, China, August 13, 2015. (Photo by Reuters/China Daily)

Firefighters work at the site as smoke rises from the debris after the explosions at the Binhai new district in Tianjin, China, August 13, 2015. (Photo by Reuters/China Daily)

Damaged cars are seen as smoke rises from the debris after the explosions at the Binhai new district in Tianjin, China, August 13, 2015. (Photo by Reuters/China Daily)

Damaged cars are seen near the site of explosions at the Binhai new district in Tianjin August 13, 2015. (Photo by Reuters/Stringer)

An injured man (R) looks on near the site of the explosions at the Binhai new district in Tianjin, China, August 13, 2015. (Photo by Reuters/China Daily)

Firefighters work at the site as smoke and fire rise from the debris after the explosions at the Binhai new district in Tianjin, China, August 13, 2015. (Photo by Reuters/China Daily)

A firefighter works at the site near damaged vehicles as smoke rises from the debris after the explosions at the Binhai new district in Tianjin, China, August 13, 2015. (Photo by Reuters/China Daily)

A firefighter looks on near damaged vehicles as smoke rises from the debris after the explosions at the Binhai new district in Tianjin, China, August 13, 2015. (Photo by Reuters/China Daily)

Volunteers guide the traffic on a street near the playground of a primary school, which serves as a temporary shelter for victims, after explosions at Binhai new district in Tianjin, China, August 13, 2015. The placard reads: “Currently lack of first-aid medicine and daily necessities, water is abundant, people who are coming to give water please go around”. (Photo by Reuters/Stringer)

Medical volunteers walk past tents set up at the playground of a primary school as temporary shelters for victims after explosions at Binhai new district in Tianjin, China, August 13, 2015. (Photo by Reuters/Stringer)

People leave their home for temporary shelters near the site of the explosions, at the Binhai new district, Tianjin, August 13, 2015. (Photo by Reuters/Stringer)

People wearing mask leave their home for temporary shelters near the site of the explosions, at the Binhai new district, Tianjin, August 13, 2015. (Photo by Reuters/Stringer)

A man takes pictures of a damaged vehicle under a bridge near the site of the explosions at the Binhai new district in Tianjin August 13, 2015. (Photo by Reuters/Stringer)

A firefighter rests on a highway next to the site of explosions at the Binhai new district in Tianjin August 13, 2015. (Photo by Jason Lee/Reuters)

Motorcyclists ride along a highway, next to damaged trucks, near the site of the explosions at the Binhai new district in Tianjin August 13, 2015. (Photo by Jason Lee/Reuters)

A damaged truck is seen on a highway near the site of the explosions at the Binhai new district in Tianjin August 13, 2015. (Photo by Jason Lee/Reuters)

A driver is seen inside a damaged car on a highway near the site of the explosions at the Binhai new district in Tianjin August 13, 2015. Two massive explosions caused by flammable goods ripped through an industrial area in the northeast Chinese port city of Tianjin late on Wednesday, killing 17 people and injuring around 400, official Chinese media reported. (Photo by Jason Lee/Reuters)

Damaged vehicles and overturned containers are seen near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

Firefighter's truck and other rescue vehicles are pictured as smoke rises among shipping containers after explosions at Binhai new district in Tianjin, China, August 13, 2015. (Photo by Reuters/Stringer)

A man sleeps inside a damaged vehicle on a highway near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

Damaged vehicles are seen on a highway near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

Workers clean debris on a highway near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

A man stands on a barrier next to a damaged vehicle on a highway near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

Three Korean businessmen look on from a highway near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

A worker cleans a highway near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

A firefighter watches smoke rising from a highway next to an ambulance, near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

A firefighter rests on a highway, near the site of the explosions, as smoke rises at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

Firefighters carry the body of a victim onto a van after explosions at Binhai new district in Tianjin, China, August 13, 2015. (Photo by Reuters/Stringer)

Tents are set up at the playground of a primary school as temporary shelters for victims after explosions at Binhai new district in Tianjin, China, August 13, 2015. (Photo by Reuters/Stringer)

Paramilitary police prepare to enter the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

Paramilitary police stand in formation outside the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

A paramilitary policeman wears a mask as he blocks the road leading to evacuated residential area and the explosion site in Binhai new district in Tianjin, China August 13, 2015. (Photo by Damir Sagolj/Reuters)

A man uses a mobile phone and a microphone to report from the explosion site in Binhai new district in Tianjin, China August 13, 2015. The death toll from two huge explosions that tore through an industrial area in the northeastern Chinese port of Tianjin more than doubled to 44, the official Xinhua news agency said on Thursday. (Photo by Damir Sagolj/Reuters)

People evacuated from residential area look at debris that landed and damaged the road about two kilometres from the explosion site in Binhai new district in Tianjin, China August 13, 2015. (Photo by Damir Sagolj/Reuters)

A man takes pictures at the explosion site in Binhai new district in Tianjin, China August 13, 2015. (Photo by Damir Sagolj/Reuters)

Damaged buildings and cars are seen near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

Damaged cars are seen near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

Excavators work near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

An injured man talks on his mobile phone at the site of the explosions at the Binhai new district in Tianjin August 13, 2015. (Photo by Jason Lee/Reuters)

A damaged car is seen near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

A man looks at pluming smoke at the explosion site in Binhai new district in Tianjin, China August 13, 2015. (Photo by Damir Sagolj/Reuters)

Debris thrown out of windows and shattered glass are seen at the evacuated residential area near the explosion site in Binhai new district in Tianjin, China August 13, 2015. (Photo by Damir Sagolj/Reuters)

Firefighters take a break after trying to put fire down at the explosion site in Binhai new district in Tianjin, China August 13, 2015. (Photo by Damir Sagolj/Reuters)

A man looks at smoke pluming from the explosion site in Binhai new district in Tianjin, China August 13, 2015. (Photo by Damir Sagolj/Reuters)

A man adjusts his mask as smoke plumes from the explosion site in Binhai new district in Tianjin, China August 13, 2015. (Photo by Damir Sagolj/Reuters)

Security personnel walk between damaged trucks near the explosion site takes pictures of pluming smoke in Binhai new district in Tianjin, China August 13, 2015. (Photo by Damir Sagolj/Reuters)

Soldiers rest under the bridge near the explosion site takes pictures of pluming smoke in Binhai new district in Tianjin, China August 13, 2015. (Photo by Damir Sagolj/Reuters)

A woman evacuated from a residential area looks at a large metal object that landed and damaged the road about two kilometres from the explosion site in Binhai new district in Tianjin, China August 13, 2015. (Photo by Damir Sagolj/Reuters)

A man shows the victory sign at the explosion site in Binhai new district in Tianjin, China August 13, 2015. (Photo by Damir Sagolj/Reuters)

Smoke rise from container boxes near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

A bulldozer works near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

Smoke rise from the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

Workers clean a road near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

A damaged road sign is seen near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Jason Lee/Reuters)

A figurine of Maitreya Buddha is seen under a broken car window, near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. Officials from the northeast Chinese city of Tianjin, where two huge blasts in warehouses containing toxic chemicals and gas killed 44 people, said just a week ago they had discussed tightening safety standards with companies at the port. (Photo by Jason Lee/Reuters)

An aerial picture of shattered builders' temporary work sheds is seen near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Reuters/Xinhua)

An aerial picture of smoke rising at the site of the explosions is seen at the Binhai new district, Tianjin, August 13, 2015. (Photo by Reuters/Xinhua)

A man looks out from inside a damaged residential building near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Damir Sagolj/Reuters)

Fire engines are seen at the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Damir Sagolj/Reuters)

A worker salvages items from a damaged dormitory near the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Damir Sagolj/Reuters)

A man takes pictures from inside a damaged residential building towards the site of the explosions at the Binhai new district, Tianjin, August 13, 2015. (Photo by Damir Sagolj/Reuters)