The incident happened in Roosevelt on West Greenwich Avenue shortly before 4 p.m. Thursday, Aug. 15.
Nassau County Police said a 10-year-old girl was riding her bicycle when she lost her balance and struck the side of a passing mini school bus traveling eastbound on West Greenwich Avenue.
The child suffered severe abrasions on both of her legs, and her 40-year-old mother injured her right hand trying to help her. Both were taken to a hospital.
The school bus driver, a 44-year-old woman, remained at the scene. Nobody else was injured.
It was not immediately clear whether any children were on the bus at the time.
Click here to follow Daily Voice West Islip and receive free news updates.