An infant was killed and a woman and another child were injured after a car apparently backed into them in the Laurel area Friday morning, police said.

The incident occurred about 9 a.m. in the 8300 block of Montpelier Drive, authorities said. Cpl. Larry Johnson, a Prince George’s County police spokesman, said preliminary information suggests that someone pulled a vehicle into a driveway but forgot to put it in park, and that vehicle “drifted back” into a mother and her two children.

An infant child was killed, Johnson said, and the mother and another child were taken to the hospital for their injuries. Prince George’s County fire officials said the infant -- who was initially taken to the hospital in critical condition -- was 6 months old, and the other child was three years old.

It remains unclear who had driven the vehicle into the driveway.