A 7-year-old boy riding a scooter in the Bronx was killed when an MTA bus rammed into him Saturday afternoon, cops said.

Shevon Bethea, of Brooklyn, was riding his Razor scooter around 3:30 p.m. when an MTA bus heading south on Webster Avenue near East 184th Street slammed into him, police said.

Paramedics rushed Bethea — who had severe body trauma, to St. Barnabas Hospital, where he was pronounced dead.

The 38-year-old bus driver remained on scene and was not immediately charged.