Washington authorities say a 4-year-old boy shot his pregnant mother in the face Saturday after the boy found a loaded, unsecured gun under a mattress.

The King County Sheriff’s Office said the 27-year-old mother is eight months pregnant and was taken to Harborview Medical Center with life-threatening injuries.

Deputies said the boy’s father put the gun under a mattress because he was afraid of recent crime in the neighborhood.

Under a new state law, gun owners could face criminal charges for not safely storing a gun. It’s unclear who the gun is registered to.

Detectives will be looking into the case on Monday to see if any charges will be filed.