Halifax police got a 911 call from a person threatening to hurt people if they left the NSCC Akerley campus today, leading them to lock down the campus this afternoon.

The Dartmouth school was evacuated Thursday evening as police investigated the threat.

"Situation in hand: finishing evacuation, doing final checks/bldg sweep. No threat confirmed on campus at this point. Thanks for cooperation," police tweeted at 6:40 p.m.

At 7:15 p.m., an announcement on the school's loudspeakers gave the all-clear and told people to return to normal business.

Police will investigate the threat to try and find out where the call came from and to learn the "legitimacy" of the threat.