Police say they arrested a wanted bank robber on Friday night after the man allegedly robbed a pair of banks earlier in the day.Longmont Police arrested Richard Ibbeson on suspicion of robbing two banks -- one in Longmont and one in Boulder -- after Ibbeson was stopped for a traffic incident in Westminster.Boulder Police said Ibbeson walked into Advantage Bank on Friday afternoon on the 1600 block of Canyon Boulevard, put a backpack on the counter and demanded all of the money. It is reported the teller told Ibbeson there was no money in the drawer and asked if he wanted to wait.After mulling over the offer, Ibbeson purportedly walked out without any money.Longmont police spokesman Tim Lewis said less than an hour later, Ibbeson walked into a Wells Fargo bank inside a Safeway store at 1050 Pratt Boulevard, and demanded money from a bank teller.Ibbeson left with an undisclosed amount of money, Lewis said. Ibbeson was stopped less than an hour after the second bank robbery by a Longmont police officer. However there was no probable cause at the time to arrest him at the time of the stop.Ibbeson was stopped at about 8 p.m. in Westminster and subsequently arrested. Westminster police held Ibbeson until Longmont officers took custody of him, and took him to Boulder County Jail, Lewis said.