4-year-old boy shoots pregnant mother in the face

A pregnant Washington state woman remained hospitalized, but her condition improved after her 4-year-old son shot her in the face with a loaded handgun he found under a mattress.

King County Sheriff's Office spokesman Sgt. Ryan Abbott said the 27-year-old mother was hospitalized Saturday with life-threatening injuries. 

He added her condition improved Sunday and she was transferred to another hospital.

Abbott said the woman, who's eight months pregnant, and her boyfriend, who is the father of her son, were in bed watching television when the boy found the unsecured gun between the mattress and box spring.

The woman's boyfriend told deputies he borrowed the gun for protection.

The shooting is under investigation.