Police say a man tried to rob a 70-year-old woman at Mother Frances Hospital in Tyler today. The woman was in the North parking lot, when she says a man approached her with a silver handgun and demanded her purse. She then screamed and ran towards the hospital. Police are looking for a black male in his late teens to early 20's. He is about 5'8", with a medium build. He was last seen running through the parking lot, wearing a gray hooded sweatshirt and dark colored pants. If you have any information, call the Tyler Police Department.