BOULDER (AP) — A man armed with a machete was shot and killed by police Wednesday at the University of Colorado in Boulder after officials say he refused to drop the weapon.

The unidentified man brandished the machete in a menacing way during an altercation with another person in the parking lot of the sports complex and then went inside a building, campus police spokesman Scott Pribble said.

Police confronted him and asked him to drop the weapon, Pribble said.

“He refused and it was at that time for public safety that shots were fired,” he said.

Pribble said he did not know the nature of the altercation in the parking lot, or whether the man was a student.

The university sent text alerts to all students, faculty and staffers telling them to take protective action but classes continued normally, school spokesman Ryan Huff said.

Following campus protocol, they weren’t ordered to go on a lockdown since they were in different locations on or off campus. It’s up to students to decide what actions they should take, including running, hiding or fighting if they confront a suspect, Huff said.