Melvindale High School was put on lock down Tuesday afternoon because of a police situation unfolding in a nearby neighborhood.
Police said they are monitoring a gunman who broke into a house in the 18000 block of Prospect Street and barricaded himself inside.
Neighbors on either side of the home were evacuated.
The high school is also on Prospect Street, near Allen Road and Oakwood Boulevard.
The school was cleared for dismissal at 2:40 p.m.
Police have cleared the scene. No arrests have been made.
Stay with Local 4 News and ClickOnDetroit.com for updates to this developing story.