TULSA, Ok. - The search is on for a man after an overnight armed robbery of a central Tulsa Walgreen's store. Tulsa Police Sergeant Kurt Dodd says the man came into the store at 15th and South Lewis just before 10 p.m. Monday and walked around for awhile. "Hands the teller a note demanding the money and displays a large kitchen knife. The loss at this time seems only to be cash," Dodd says. After reviewing surveillance video, police believe the same man also may be responsible for an armed robbery of a Walgreen's at Pine and Lewis last Saturday night.