Updated

Police are investigating a report of a shooting at the University of Oklahoma, but the school says no evidence has been found yet of shots being fired.

Norman Police said at around 11:15 a.m. local time they received a call from University of Oklahoma police asking them for their assistance in investigating reports of a possible shooting, KOKH reports.

“Shooting on campus. Avoid Gould Hall. Seek immediate shelter in place,” read a tweet posted on the school’s official account.

But University of Oklahoma’s public information officer later said "as of this time, no evidence has been found of any shots being fired."

SWAT teams have searched through Gould Hall and have not found anything yet, KFOR reports. Normal campus operations have resumed except for Gould Hall. There are no reports of injuries.

University of Oklahoma President David Boren said the shots fired report may have been a result of a piece of equipment backfiring.

The reports come a day after a deadly shooting at Purdue University.