A man riding a scooter and struck by a city bus in Brooklyn was in critical condition Sunday night, police said. The man, 44, was on a two-wheeled scooter around 2:13 p.m. Sunday on Linden Blvd. when he collided with an MTA bus traveling south on Church Ave., cops said. Medics rushed the man to Brookdale University Hospital and Medical Center in critical condition. The bus driver, 35, remained on the scene, according to police. The investigation is ongoing. Gardiner Anderson for New York Daily NewsPolice investigate the crash on Church Avenue and East 93rd Street on Sunday. (Gardiner Anderson for New York Daily News)