Ukrainian tanks stand in the yard of an apartment block in Avdiivka, eastern Ukraine, Wednesday, February 1, 2017. Heavy fighting around government-held Avdiivka, just north of the rebel-stronghold city of Donetsk, began over the weekend and persisted into early Wednesday. The Contact Group called for the opposing sides to cease fire and urged them to pull back their heavy weapons by the end of the week. (Photo by Evgeniy Maloletka/AP Photo)





A picture is seen at the building, which was damaged during fighting between the Ukrainian army and pro-Russian separatists is seen in the government-held industrial town of Avdiyivka, Ukraine February 1, 2017. (Photo by Gleb Garanich/Reuters)





A woman stands amidst the debris of her damaged apartment, which according to locals was caused by recent shelling, in Donetsk, Ukraine, February 1, 2017. (Photo by Alexander Ermochenko/Reuters)





Tanks are seen in the government-held industrial town of Avdiyivka, Ukraine, February 2, 2017. (Photo by Gleb Garanich/Reuters)





Crew members prepare tanks in the government-held industrial town of Avdiyivka, Ukraine, February 2, 2017. (Photo by Gleb Garanich/Reuters)





Lesha, 8, plays near a building, which was damaged during fighting between the Ukrainian army and pro-Russian separatists, in the government-held industrial town of Avdiyivka, Ukraine, February 2, 2017. (Photo by Gleb Garanich/Reuters)





Tanks are seen in the government-held industrial town of Avdiyivka, Ukraine, February 2, 2017. (Photo by Gleb Garanich/Reuters)





A local resident carries a can with water in the government-held industrial town of Avdiyivka, Ukraine, February 2, 2017. (Photo by Gleb Garanich/Reuters)





A military doctor helps local resident in the government-held industrial town of Avdiyivka, Ukraine, February 2, 2017. (Photo by Gleb Garanich/Reuters)





A woman is pictured in front of her building, which was damaged during fighting between the Ukrainian army and pro-Russian separatists, in the government-held industrial town of Avdiyivka, Ukraine, February 2, 2017. (Photo by Gleb Garanich/Reuters)





A man is seen in front of his building, which was damaged during fighting between the Ukrainian army and pro-Russian separatists, in the government-held industrial town of Avdiyivka, Ukraine, February 2, 2017. (Photo by Gleb Garanich/Reuters)





Children, who were recently evacuated from their residencies due to shelling, laugh while sitting in front of a wall painting commemorating the victory over Nazi Germany in World War Two at a dormitory in Donetsk, Ukraine, February 2, 2017. (Photo by Alexander Ermochenko/Reuters)





A woman carries a bag with a baby while being evacuated by local emergencies ministry members in Donetsk, Ukraine, February 2, 2017. (Photo by Alexander Ermochenko/Reuters)





A tank is seen in the Ukrainian town of Avdiivka on February 1, 2017 as government forces and Russian- backed separatists exchanged mortar and rocket fire for a fourth day around the flashpoint eastern town of Avdiivka just north of the rebels' de facto capital Donetsk The death toll from the latest escalation in fighting in Ukraine rose to 19 on February 1 as international alarm rang out over the spike in bloodshed in the European Union' s back yard. (Photo by Aleksey Filippov/AFP Photo)





A local resident eats free food at a humanitarian aid center in Avdiivka, eastern Ukraine, Wednesday, February 1, 2017. Freezing residents of an eastern Ukraine town battered by an upsurge in fighting between government troops and Russia-backed rebels flocked to a humanitarian aid center Wednesday to receive food and warm up. (Photo by Evgeniy Maloletka/AP Photo)





A municipal worker inspects damage to a home after shelling in the city of Donetsk, eastern Ukraine, Wednesday, February 1, 2017. Heavy fighting between government troops and Russia-backed rebels continues in eastern Ukraine on Wednesday, at least 10 people have been killed since Monday and dozens wounded. (Photo by Alexander Ermochenko/AP Photo)





A car that was destroyed when a grad rocket, one of many that hit the same part of town, fell earlier around 7:30 in the morning, on February 1, 2017 in Avdiivka, Ukraine. The conflict with Russia-backed rebels has intensified dramatically in the front-line town over the past several days, leaving residents without heat or electricity in frigid temperatures. (Photo by Brendan Hoffman/Getty Images)





Ukrainian artillery is moved toward a field near the front lines on February 1, 2017 near Keramik, Ukraine. The conflict with Russia-backed rebels has intensified dramatically over the past several days. (Photo by Brendan Hoffman/Getty Images)





Nadiya Volkova, 24, is comforted by her mother-in-law Galina Nikolaevna as she grieves over the body of her mother Katya Volkova, 60, who was killed by shelling at around 7:30am as she walked to the store on February 1, 2017 in Avdiivka, Ukraine. (Photo by Brendan Hoffman/Getty Images)





A Ukrainian soldier shows pieces of shrapnel in a crater left by an explosion in Avdiivka, Ukraine, Tuesday, January 31, 2017. Fighting between government troops and Russia-backed separatist rebels in eastern Ukraine escalated on Tuesday, killing at least eight people late Monday and early Tuesday, injuring dozens and briefly trapping more than 200 coal miners underground, the warring sides reported. (Photo by Inna Varenytsia/AP Photo)





A wounded Ukrainian soldier is treated in a hospital in Avdiivka, Ukraine, Tuesday, January 31, 2017. (Photo by Inna Varenytsia/AP Photo)





A wheelchair-bound man and a child attend a funeral ceremony for the seven Ukrainian servicemen, who were recently killed during a military conflict in the east of the country, in central Kiev, Ukraine, February 1, 2017. (Photo by Valentyn Ogirenko/Reuters)





Ukrainian soldiers carry the coffin of Ukrainian servicemen killed in eastern Ukraine, in Independence Square in Central Kiev, Ukraine, Wednesday, February 1, 2017. Recent fighting is concentrated around the suburb of Avdiivka on the northern outskirts of the separatist stronghold of Donetsk where residents have been without electricity for some days. (Photo y Sergei Chuzavkov/AP Photo)





Mourners react during a funeral ceremony for the seven Ukrainian servicemen, who were recently killed during a military conflict in the east of the country, in Independence Square in central Kiev, Ukraine, February 1, 2017. (Photo by Valentyn Ogirenko/Reuters)