Police responding to a panicked report of an active shooter on the University of Oklahoma campus late Friday found no victims and no gunman. University police issued an “all clear” more than an hour after an alert was sent out to students urging them to seek shelter amid reports of a gunman on campus. “After a thorough search, no threat was found. There is no threat to campus. Alert has been canceled,” police said just before 11 p.m. local time. Numerous law enforcement agencies had descended on the campus in Norman after police initially issued an ominous alert saying, “There is an active shooter at the Van Vleet Oval. Take immediate action now. Run. Hide. Fight!” No further details were immediately available on what led to the false alarm.