MINNEAPOLIS (WCCO) — Authorities say a Rosemount school was put on lockdown for about an hour Wednesday after someone spotted a man wearing a holstered handgun.

Dakota County Technical College officials say the lockdown started at about 1:30 p.m. as a precautionary measure. Firearms are not allowed on school property.

Authorities searched the school and the surrounding area, but did not find the armed individual. The lockdown was lifted at about 2:45 p.m.

The Dakota County Sheriff’s office is investigating.