CHARLOTTESVILLE, Va. — There is no evidence of an attacker and campus activities are resuming at the University of Virginia after a gunman was reported near a library on campus, according to an emergency alert from campus police.

"No evidence at this time of an attack, investigation is ongoing," Brian Coy, a spokesperson for the university, said in a statement to USA TODAY.

The school sent out an emergency alert that warned students an "active attacker" with a gun was reported near Shannon Library around 3 p.m. ET on Nov. 3 and directed them to "run-hide-fight." Sirens could be heard in the southern part of the campus as the emergency messages were shared with students.

Officials sent out an all clear notice around 4:45 p.m. ET.

"After extensive investigation, police identified no evidence of attack or threat on UVA Grounds or nearby. Investigation into false report ongoing. Clear to resume normal operations," the subsequent emergency alert said.