PORTLAND, Ore. – A man who was armed with a handgun when he entered a Portland Community College library was arrested after he barricaded himself inside a North Portland home near the campus, police said.

Portland police Sgt. Chris Burley said officers were called to the PCC Cascade Campus after receiving a report of a man with a gun.

Police later identified the man as 39-year-old Nathaniel M. Irving.

Officers learned Irving went inside the library and said he needed help. An employee called campus security.

When security officers arrived, Irving ran away with a handgun in his hand, Burley said.

Police officers arrived and followed Irving’s route. They found a handgun along the way.

As officers searched for Irving near Peninsula Park, a homeowner told them a man entered his house without permission.

Officers called a police K-9 team, the Special Emergency Reaction Team (SERT) and crisis negotiators. They entered the home and arrested Irving, who had barricaded himself in an upstairs bedroom.

Irving is charged with felon in possession of a firearm, first-degree theft, possession of a loaded firearm in a public building, and possession of a loaded firearm.