Mr. Bonaparte was turning right onto East 215th Street from White Plains Road on Tuesday when he lost control of the vehicle, hit a parked car and then struck the girl, the police said. She and her mother were taken to Montefiore Medical Center, where Djeneba was pronounced dead, the police said. The mother appeared to be unhurt.

The collision occurred almost on the doorstep of Mama G. African Kitchen, a restaurant near a heavily traveled stretch of White Plains Road in a strip of storefronts in the Olinville neighborhood beneath the elevated tracks that carry the Nos. 2 and 5 trains.

After nightfall on Tuesday, a damaged, empty stroller sat upright on the curb between the restaurant’s side wall and the white S.U.V., which had its front wheels at an angle up on the sidewalk. Fragments of a vehicle grille littered the pavement.

Atta Bofa, 43, said he had been sitting outside a grocery store a few doors from the intersection when he heard a loud noise, a “boom” he recreated in an interview by pounding his fist into his palm. Then, he said, he saw a woman crying for help.

Mr. Bofa said he ran around the corner and saw the car and the stroller pressed to the wall.

“But I didn’t see the baby,” he said. “I said, ‘Where’s the baby?’ And they said, ‘The baby’s under the car.’”