BERKELEY (CBS SF) — UC Berkeley police have lifted a shelter-in-place order Thursday after a “credible campus-wide threat” triggered a massive search of the university grounds and the cancellation of all classes and school services for the day.

At around 1:41 p.m., UC Berkeley police announced the shelter order was lifted and instructed anyone still on the campus to leave “in a safe and orderly way” immediately.

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While police said campus buildings would remain locked up, the UCPD “has determined based upon its investigation that it is appropriate to end the shelter in place.”

Police earlier confirmed that this isn’t an active shooter situation, but noted officers are looking for “a person who may want to harm specific individuals.”

The shelter order was in place for over four hours. Police have not given any indication about whether they have found the individual who they were searching the campus for, though a subsequent tweet termed the situation as “resolved.”

UC Berkeley officials said facilities services are locking all buildings on campus and noted that all campus services — including libraries, dining and parking garages — are closed until further notice.

UCB police search Berkeley campus following credible threat, shelter-in-place order (CBS)

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In-person classes are canceled through the remainder of the day. Instructors are advised to accommodate students and — if possible — record their remote classes to provide access to students at a later time.

The initial advisory issued at 9:30 a.m. stated that there was police activity on campus, but did not specify a location or details on the nature of the incident. The advisory said people should go inside and move away from doors and windows.

Emergency personnel are responding.

Police later said that officers were investigating a “credible campus-wide threat.”

The UC Berkeley police Twitter account posted that this was not an active shooter situation after unconfirmed comments on social media that students had been warned of an active shooter by school officials. The post also specified that officers are looking for “a person who may want to harm specific individuals.”

Police additionally said that anyone who is not at the campus should stay away from the area.

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UC Berkeley provided updates on the situation via the campus website.

Source: sanfrancisco.cbslocal.com.