A South Portland man was arrested with a toy firearm after allegedly robbing a bank.Police said they arrested Donald Sturton, 70, Wednesday afternoon.Around 3:30 p.m., police responded to the Bank of America on Philbrook Avenue after receiving reports of a robbery.>> Download the free WMUR appA man came into the bank, claimed to have a firearm and made off with some cash, police said.Though the man claimed to have a gun, one was never shown, police said.Police located Sturton in the Maine Mall parking lot.He was charged with robbery and taken to the Cumberland County Jail.