A victim reported that while he was riding on a Pittsburg bound train on 7/6 at 2345 hours, three suspects (all BMs, 19-20, thin) approached him as the train approached the North Concord Station. One suspect asked him if he had any marijuana for sale. When he told them he did not, one suspect asked for money. The victim pulled out his wallet to give the suspect $5 and the suspect grabbed his wallet from him as the other two suspects stood close by in an apparent attempt to intimidate the victim. The suspects then all fled from the train.