A Burbank man died after falling backwards off the railing of a bridge Monday night in River North.

Matthew Lukaszczyk, 18, was sitting on the rail of a crossover bridge when he accidentally fell backwards off the bridge and onto the sidewalk below about 10:20 p.m. in the 400 block of North Rush, according to Chicago Police and the Cook County Medical Examiner’s Office.

He was taken to Northwestern Memorial Hospital with head trauma and was later pronounced dead, authorities said. His death was ruled an accident following an autopsy Tuesday. 

Area Central detectives were investigating.