I had almost the same, but the bloodsuckers were in the wild teritorry runnin´ to the train and there they stopped, they didn´t even recognise me, only if I attacked from 1 m distance:-)
Lol! now it is confirmed that Bloodsuckers are stupid. XD XD XD XD
Anyway. i once found a dead soldier in Agroprom Underground with his name being "Private Petrenko" maybe he is... was Colonel Petrenko's brother.