UPDATE (3:51 PM EDT): Police say there is no active shooter.
UPDATE (3:47 PM EDT): This may be a false alarm.
There are reports of an active shooter on the University of Southern California's campus. The school is on lockdown and police are responding.
According to an alert from the school, shots were reported but not confirmed. Students were advised to shelter in place.
This post will be updated when and if more information is available.