An elderly woman was killed in a hit-and-run crash when the driver of a scooter slammed into her as she traversed a Bronx crosswalk Monday, cops said.

The victim, believed to be in her 80s, was struck crossing E. 225th St. heading south on White Plains Road when the scooter driver struck her in the crosswalk around 2:30 p.m., according to law enforcement.

Medics rushed the victim to Jacobi Medical Center, where she died.

The driver of the grey, red and white scooter fled following the scene, said police. There were no arrests.

The fatal hit-and-run occurred less than two hours after a 13-year-old boy was killed riding on the back of a moped in Queens after his friend slammed into an open car door and then careened into a moving truck.

Footage obtained by the Daily News shows the moped’s teenage operator, also 13,  colliding with a door opened by the driver of a parked vehicle on 162nd St. near 45th Ave. in Flushing when the scooter slammed into the truck about 12:35 p.m.