A city bus struck and critically hurt a 15-year-old boy riding an electric scooter in Queens Tuesday afternoon, police sources said.

The teen was riding the scooter near the corner of Seneca and Gates Aves. in Ridgewood about 1:15 p.m. when a B13 bus heading west on Gates struck him, cops said.

Medics took him to Brookdale Hospital with severe body trauma, cops said.

Authorities are still investigating the crash.