Authorities said a pregnant Washington state woman was shot in the face on Saturday by her four-year-old son, after the boy found a loaded and unsecured gun under a mattress.

The King county sheriff’s office said the 27-year-old woman, who is eight months pregnant, 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 neighborhood crime.

Under a new Washington state law, gun owners can face criminal charges for not safely storing a gun. It was unclear who the gun was registered to.

Local television reported that detectives would look into the case on Monday, to see if any charges will be filed.