Normal activities are resuming on the Indiana University campus after a warning was sent to students and staff.

I.U. said an armed subject was seen near Greek houses on the Bloomington campus. Shortly before 7:30 p.m. on Thursday, Dec. 15, the school warned students and staff to shelter in the nearest available room.

The alert was active until shortly before 8:30 p.m.

I.U. says police are looking for a male and two females suspects of intimidation with a weapon.