The person armed with a knife who was shot and killed by a police officer was a teenager, the New Hampshire attorney general's office said Tuesday.

Officers arrived at a Gilford home late Sunday after authorities received a 911 call about a person armed with a knife there.

The attorney general’s office said that the officers encountered 17-year-old Mischa Fay inside the home with the knife and that one officer discharged a stun gun and another officer fired his weapon. Fay died of a single gunshot wound to the chest, an autopsy determined.

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The identities of the officers and the person who was killed have not been released by authorities. No officers were injured.

The shooting remains under investigation.