LEHI, Utah (AP) — An 8-year-old boy has died after accidentally shooting himself in a car while his mother was inside a Utah convenience store, police said.

The boy was alone in the car about 7:40 p.m. Monday in Lehi — a city about 30 miles (48 kilometers) south of Salt Lake City — when he shot himself in the head, Jeanteil Livingston with the Lehi City Police Department told KSL-TV. The boy died at a hospital on Tuesday morning, police said.

The shooting appeared to be “unintentional and self-inflicted,” police said in a statement.

It is unclear how the boy got ahold of the weapon. Police did not return a phone message from The Associated Press seeking more information Tuesday.

Doug Shields said he was putting gas in his vehicle when he heard the gunshot and then a woman screaming. He went to the car where it happened. He told KSL and KUTV that he heard the mother say the boy found the gun under the seat.

Monday’s shooting happened less than two weeks after a 5-year-old Utah boy died after accidentally shooting himself with a handgun at his house in Santaquin, which is about 65 miles (105 kilometers) south of Salt Lake City.

Utah does not have any laws to penalize someone for failing to secure an unattended firearm and leaving it accessible to an unsupervised minor, according to the Giffords Law Center to Prevent Gun Violence. The state also does not require unattended firearms to be stored in a certain way or require a locking device to be sold with a firearm.

In St. Louis, a 4-year-old boy died Monday from a gunshot wound suffered while he was in a house with three other children under the age of 10 and no adults present. Police are trying to determine who was handling the gun at the time of the shooting.