The Sheriff's Office in Jacksonville, Florida, said a 1-year-old boy was struck by a truck after falling out of an SUV.
Jacksonville Fire and Rescue Department was called to Arlington and Lillian roads after someone was hit by a car.
Police said a Chevy Tahoe was turning right when the left rear door opened and the 1-year-old fell out.
"She (the driver) had four kids with her," said JSO Sgt. Donald Washington. "Her 4-year-old daughter was in the front seat. She had her two nephews and her son in the back seat."
A Chevy Silverado traveling behind the Tahoe ran over the 1-year-old, police said.
The baby, who was not in a car seat, was taken to an area hospital with life-threatening injuries. Police said the mother claims the child was wearing a seat belt.
The child was among four children in the SUV without car seats.
JSO says 1-year-old was among 4 children in an SUV without car seats. He fell out of be SUV and was hit by a truck @ActionNewsJax— Brittney Donovan (@brittneyANjax) February 12, 2018
"At this time, we don’t know how he got out," Washington said. "But it’s been said that he’s been known to open the back door."