GRAYS FERRY - The FBI and Philadelphia Police Department Violent Crimes Task Force are asking for help identifying and locating a man in connection with a robbery of a Chase Bank branch, officials announced.Authorities say a man walked into the bank branch on the 2800 block of Grays Ferry Avenue Tuesday, around 10:50 in the morning.The man proceeded to hand a teller a demand note and a withdrawal slip.The man received an undetermined amount of cash and took off from the bank on foot.Authorities describe the man as being in his late 20s to early 30s.