PORTLAND, Ore. (KOIN) — Authorities revealed that the “threat of violence” that forced Tigard High School to cancel classes on Friday apparently stemmed from a fight between students.

The district announced Friday afternoon that the threat was deemed not credible and after-school activities will be held on campus.

In a release, Tigard police said the fight broke out at the high school on Thursday.

Some of the students involved and an adult were later spotted at a gas station where they allegedly made verbal threats against each other, according to police.

After this incident, an anonymous report was made to Safe Oregon, a school safety tipline, claiming there was going to be a shooting at the school.

Police said the students involved in the fight have been identified and they’re working to speak to them.

The Tigard-Tualatin School District said it was canceling Friday’s classes “out of an abundance of caution.”

“Not knowing what happened outside the school and not being able to confirm that, that is when the decision was made,” said Tigard School Resource Officer Nick Nunn.

The school’s resource officer is assisting with the investigation.

Safe Oregon is designed to give kids, parents, schools and their communities a way to report safety threats or potential acts of violence. They can be reached at 844-472-3367 or tip@safeoregon.com There is also a Safe Oregon app available for smartphones.