PHILADELPHIA (AP) -- A college senior has been reported missing after a night out with friends at a crowded Philadelphia bar. Police say 21-year-old Shane Montgomery was home from West Chester University and met up with friends Wednesday night at a crowded bar in the Manayunk neighborhood. Authorities say he became separated from them in Kildare's Irish Pub and was escorted out by a bouncer at 2 a.m. Thursday after stumbling on a bar stool. He hasn't been seen since. His mother, Karen, is offering a $10,000 reward for help finding him. About 200 volunteers have been searching Main Street in Manayunk and the nearby banks of the Schuylkill River. Montgomery is a liberal arts major and a former high school runner. He is 5-foot-11 and 130 pounds, with short brown hair and green eyes.