A 25-year-old man from Maine has pleaded guilty to making threats against a school in New Hampshire.

According to CBS 13 News, Kyle Hendrickson pleaded guilty to charges in connection with online threats made against Portsmouth High School in April.

Hendrickson was accused of posting a video to Snapchat where he showed a handgun while in a vehicle outside of the school, along with text indicating he was going “shoot up the school.”

The Department of Justice says an AR-15 rifle, a shotgun, body armor and ammunition were found in his vehicle.

Hendrickson will be sentenced in March.