As reported by the Ohio-based Chillicothe Gazette, officers in the town of Waverly responded to a complaint that shots were fired inside a bedroom in a home and that the homeowner had more guns and was threatening others. Police knocked on the door, called on the phone, and even brought in a trained negotiator, but the man refused to speak to anyone for several hours. So the officers contacted the Pike County Sheriff’s Department and the Highway Patrol’s Strategic Response Team for assistance.

What officers got was two search robots.

First, a camera-equipped robot entered the home to locate the man and the guns. A second larger bot was then sent in, but when the owner spotted it, he opened fire with a small caliber pistol damaging it. Shortly afterward, police finally entered the home and used an electronic stun device to subdue him. After being issued a search warrant, authorities found a number of firearms within the residence, including two AK47 rifles and a 75-round ammunition drum, which is illegal in Ohio.