Police said the threat was contained by 9:15 a.m.

About 20 people inside the processing plant were evacuated and Oregon State Police's SWAT team was forming up to deal with a barricaded suspect when Nickerson emerged at about 9:49 a.m. wearing the brown smock and hairnet typically used by workers in the plant and surrendered to police.

"As far as I know, there were no injuries," Hurley said. He said Nickerson apparently only fired one shot.

He added that after the arrest, police, including the state police bomb unit, swept the facility.

Ira Brill, vice president of corporate communications for Foster Farms, said the people inside the processing plant were evacuated safely and no one was injured.

“We routinely prepare for emergencies like that,” he said. “We’re just thankful that none of our employees or any members of the public were hurt."

"The safety of our employees is our highest priority, and Foster Farms will provide counseling and support services to its Corvallis employees. We are thankful this incident was concluded without harm to our employees or the greater community. We greatly appreciate local law enforcement’s professionalism in quickly resolving the situation," Brill said in an emailed statement.