NEW PRAGUE — A sheriff says a 911 call about an active shooter at a school in southern Minnesota appears to be a hoax.

Scott County Sheriff Kevin Studnicka said students and staff at the middle school, high school and Central Education Campus buildings in New Prague are all safe.

Studnicka said a man called 911, asked for help, hung up, then called back and claimed a shooter with an AK-47 assault rifle was in a school building. He said the caller claimed there were a couple of victims. The call prompted a lockdown.

The sheriff said there is no evidence of a shooter and no one is hurt.

New Prague is about 20 miles west of Northfield. The middle and high schools have a combined enrollment of 2,067.