A 12-year-old boy was fatally injured Friday when a car that a sibling accidentally put into reverse ran over him, police in Kentucky said.

The child was standing behind a car that was being worked on in a backyard, family told police. The car rolled backward over the 12-year-old, Louisville police spokeswoman Alicia Smiley told news outlets.

The sibling’s age was not known.

The boy was pronounced dead at the scene in western Louisville.

Police continued investigating.