you remain difficult to watch. days later, 57 dead, more than 100 wounded in friday s kramatorsk train station massacre by the russians. i spoke to someone who heard the explosion and rushed to help. a former construction engineer who helps arrange medical support for people in besieged towns who have been wounded. he told us about that horrible day and suspicions he has about how it all went down. reporter: the call came friday morning, the something had happened at the train station. come immediately. he had heard the explosion, he ran right there. translator: there were bodies that were torn into pieces. reporter: 57 killed. more than 100 wounded. translator: there was a lot of blood, puddles of blood. it was easy to track how many people moved by the traces of blood on the ground. i saw a lot of elderly people, mostly women, children, and very