Dead fish are seen on the banks of Haihe river at Binhai new district in Tianjin, China, August 20, 2015. No toxic levels of cyanide have been detected in water samples taken from the Haihe river where the large number of dead fish were spotted on Thursday after last week's explosions at the north China port, according to the city's environment monitoring center, Xinhua News Agency reported. The dead fish were seen at the estuary of the Haihe River about six kilometers (3.73 miles) from the site of the August 12 chemical warehouse blasts, according to an environment expert at a news conference on Thursday. (Photo by Reuters/Stringer)

Workers remove dead fish from the Haihe river at Binhai new district in Tianjin, China, August 20, 2015. (Photo by Reuters/Stringer)

Firefighters in protection suits attend an anti-chemical drill next to storage tanks of liquefied petroleum gas, at a factory in Haikou, Hainan province, China, August 21, 2015. Nationwide inspections of facilities handling dangerous chemicals and explosives were ordered by China's State Council after the blasts at Tianjin port that killed at least 116 people last week. (Photo by Reuters/Stringer)

Firefighters in protection suits carry a a man playing the role of a victim on a stretcher during an anti-chemical drill next to storage tanks of liquefied petroleum gas, at a factory in Haikou, Hainan province, China, August 21, 2015. (Photo by Reuters/Stringer)

A soldier checks the chickens and rabbits in cages, which are to be placed by authority as a test of the living conditions near the site of last week's blasts at Binhai new district in Tianjin, China, August 19, 2015. According to local media, the animals were alive after being placed near the blasts site for two hours. Four new fires have broken out at the site where two huge blasts last week killed 116 people, Chinese state media reported Friday soon after officials said safety hazards were found at almost 70 percent of firms handling dangerous chemicals in Beijing. (Photo by Reuters/Stringer)

A soldier (back) with gas mask on, run behind animals in cages, (from L to R) pigeons, chickens and rabbits, which are placed by authority as a test of the living conditions near the site of last week's blasts at Binhai new district in Tianjin, China, August 19, 2015. (Photo by Reuters/Stringer)

Rescuers cleaning up damaged cars during the explosions in Tianjin. Cyanide levels more than 350 times standard limits have been detected in water close to the site of deadly explosions in the Chinese port city of Tianjin, officials said on August 20, 2015. (Photo by AFP Photo)

Rabbits are seen in a cage, which is placed by authority as a test of the living conditions near the site of last week's blasts at Binhai new district in Tianjin, China, August 19, 2015. (Photo by Reuters/Stringer)

People's Liberation Army (PLA) soldiers of the anti-chemical warfare corps in protection suits work next to excavators cleaning up the debris at the site of last week's blasts in Binhai new district of Tianjin, China, August 21, 2015. (Photo by Reuters/Stringer)

People's Liberation Army (PLA) soldiers of the anti-chemical warfare corps are seen in protection suits at the site of last week's blasts in Binhai new district of Tianjin, China, August 21, 2015. (Photo by Reuters/Stringer)

People's Liberation Army (PLA) soldiers of the anti-chemical warfare corps in protection suits walk among the debris at the site of last week's blasts in Binhai new district of Tianjin, China, August 21, 2015. (Photo by Reuters/Stringer)

A People's Liberation Army (PLA) soldier of the anti-chemical warfare corps in protection suit sprays liquid on the debris at the site of last week's blasts in Binhai new district of Tianjin, China, August 21, 2015. (Photo by Reuters/Stringer)

Chinese national Gao Yu Ping, who lost his wife and daughter in Monday's deadly blast, cries at the Institute of Forensic Medicine in Bangkok, Thailand, August 20, 2015. Thailand's ruling junta on Thursday said a deadly bomb attack at a religious shrine in Bangkok was “unlikely” to be the work of international terrorists, adding that the attack was not specifically targeted at Chinese tourists. (Photo by Athit Perawongmetha/Reuters)

Military personnel patrol around the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 20, 2015. International terrorists were not suspected of the bomb attack in Bangkok this week that killed 20 people and China was not the target, Thai authorities said on Thursday, as police said they believed at least 10 plotters were involved. (Photo by Chaiwat Subprasom/Reuters)

A woman places a bouquet of flowers at the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 20, 2015. (Photo by Chaiwat Subprasom/Reuters)

A woman places a wreath at the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 20, 2015. (Photo by Chaiwat Subprasom/Reuters)

A security checks on a car entering an office building after Monday's deadly blast, in central Bangkok, Thailand, August 20, 2015. (Photo by Chaiwat Subprasom/Reuters)

A woman prays at the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 20, 2015. (Photo by Chaiwat Subprasom/Reuters)

A woman prays at the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 20, 2015. (Photo by Chaiwat Subprasom/Reuters)

A security checks on a taxi entering a hotel building after Monday's deadly blast, in central Bangkok, Thailand, August 20, 2015. International terrorists were not suspected of the bomb attack in Bangkok this week that killed 20 people and China was not the target, Thai authorities said on Thursday, as police said they believed at least 10 plotters were involved. (Photo by Kerek Wongsa/Reuters)

A security checks on a taxi entering a hotel building after Monday's deadly blast, in central Bangkok, Thailand, August 20, 2015. (Photo by Kerek Wongsa/Reuters)

A family member places photographs of 4-year-old Lee Jing Xuan and her father Lee Tze Siang in front of their coffins, after they were killed in Monday's deadly blast in Bangkok, Thailand, at their home in Butterworth, Malaysia, August 20, 2015. (Photo by Olivia Harris/Reuters)

A family member places a cloth over 4-year-old Lee Jing Xuan's coffin, after she and her father Lee Tze Siang were killed in Monday's deadly blast in Bangkok, Thailand, at their home in Butterworth, Malaysia, August 20, 2015. (Photo by Olivia Harris/Reuters)

People pray as Thai classical dancers perform at the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 21, 2015. Thai government officials and police chiefs attended a religious ceremony on Friday for the victims of the country's worst ever bombing but appeared no closer to determining who carried out the attack and why. (Photo by Athit Perawongmetha/Reuters)

Thai classical dancers perform at the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 21, 2015. (Photo by Athit Perawongmetha/Reuters)

Thai government officials attend a religious ceremony at the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 21, 2015. (Photo by Athit Perawongmetha/Reuters)

Thai government officials attend a religious ceremony at the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 21, 2015. (Photo by Athit Perawongmetha/Reuters)

People place flowers for victims killed in Monday's bomb blast during a religious ceremony near at the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 21, 2015. (Photo by Athit Perawongmetha/Reuters)

A thai classical dancer touches up her makeup before performing at the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 21, 2015. (Photo by Athit Perawongmetha/Reuters)

A man leaves finger prints on a banner for the victims killed in Monday's bomb blast during a religious ceremony near at the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 21, 2015. (Photo by Athit Perawongmetha/Reuters)

People leave messages on a banner for victims killed in Monday's bomb blast during a religious ceremony near at the Erawan shrine, the site of Monday's deadly blast, in central Bangkok, Thailand, August 21, 2015. (Photo by Athit Perawongmetha/Reuters)