Police at George Mason University said they have concluded their investigation into an earlier bomb threat Thursday on its Prince William campus in Manassas.

Three buildings on the campus -- Discovery, Occoquan and Bull Run halls — were evacuated earlier in the day, officials said, and people were advised to “remain away from these buildings until further notice.”

Around noon, the university said normal operations had resumed at its Prince William campus.

Thursday’s bomb threat marks the second time in a week that GMU has had a similar incident. Last week, police at the university’s Fairfax campus conducted an investigation after a written bomb threat was found in the campus’s Art and Design Building. Authorities determined the Fairfax campus was safe.

Early Thursday, students and staff at the Prince William campus were advised to “follow the direction of police and emergency response personnel,” according to information posted on the campus police department’s Facebook page.

At 9:22 a.m., GMU gave an update on its Web site, saying that its campus police and local law enforcement officials were “continuing to investigate the bomb threat.” They advised residential students in Beach Hall to “remain in place.” Students in its Governor’s School program, officials said, would be “released to their parents or will be returned to their home school as transportation is made available.”

No vehicles were allowed to enter the campus. Employees at the campus were advised to telework or work at another campus, officials said.

Police were seeking information about the individual or individuals who made the threat. Anyone with information is asked to contact campus police at 703-993-2810.

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