LONG BEACH (CBSLA) — A shelter-in-place order at California State University Long Beach has been lifted following an investigation into what police called a “credible threat” Monday.

CSULB Police were on the scene at 1250 Bellflower Blvd. after receiving the threat shortly before 4 p.m.

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“Everyone on campus is to move indoors and shelter in place immediately. If not on campus, stay away until further notice,” read a tweet from the verified CSULB police account. Alerts were also sent via the school’s text and robocall system.

Approximately 30 minutes later, police ordered the shelter-in-place orders lifted.

CBS2/KCAL9’s Greg Mills reports a “threat of violence” was emailed to the school by a female student, who was taken into custody by University Police.

Police said there was “no ongoing threat.”

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Campus was expected to reopen for normal operations.