OLYMPIA, Wash. (AP) — Evergreen State College says the college will remain closed Thursday evening and Friday after someone called in a threat.

The college said on its website Thursday evening that Evergreen officials were notified that someone called the Thurston County Communications Center at 10:25 a.m. Thursday claiming to be armed and on the way to the school's Olympia campus.

Officials say the call was made from an unknown telephone number to the communications center's regular business phone line and not their 911 lines.

Evergreen President George Bridges made the decision to close campus upon advice from authorities.

Multiple law enforcement agencies searched campus buildings Thursday and determined no one was posing a threat.

College officials say a determination on when to fully re-open campus will be made as soon as possible.