A teenager was shot in the head by a gunman on a Citi Bike in Soho — and was rushed to Bellevue Hospital with life-threatening injuries, law enforcement sources said.

The shooting took place shortly before 2:30 p.m. Tuesday in what the sources said may have been a school-related shooting.

The shooting was on Spring Street between Varick Street and Avenue of the Americas.

There is no immediate information on the motive for the shooting.