A 12-year-old boy in Yonkers, New York, is in “extremely grave” condition after he shot himself in the head, apparently accidentally, after discovering a gun in his family’s apartment.

According to the New York Post, the unidentified boy was with a younger boy at his family’s apartment on Saturday night when he discovered a .25-caliber semiautomatic pistol in a bedroom. The 12-year-old reportedly fired the weapon twice, and one of the shots hit him in the head.

Relatives reportedly discovered the boy within 30 minutes of the shooting and called 911. According to the New York Post, the boy was lying on a floor, bleeding from a head wound, when first responders arrived.

The boy is reportedly now clinging to life at a nearby hospital. Police told the newspaper that the shooting appears to be “a self-inflicted, potential accidental injury.”

Authorities are investigating where the gun came from and how the boy was able to access it; the report states that the weapon was illegal but does not provide further specifics.

This is a developing story. CrimeOnline will provide further updates when more information is available.