SAG-AFTRA headquarters in Los Angeles and New York were evacuated on Tuesday after a phone threat was called in.

The union has closed its offices in both cities, according to Deadline, on the recommendation of local authorities. Officers are conducting thorough investigations of the union offices. The Los Angeles Police Department said, “it’s still an ongoing investigation.”

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The LAPD spokesperson confirmed a phone call was made “saying that they may be attacking the SAG office.” The call was placed at 11:46 a.m. PT on Tuesday.

“I can confirm that we have received a threat,” said Pam Greenwalt, the union’s spokesperson. “We are taking it seriously. We have evacuated our Los Angeles and New York offices.”

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“We have notified law enforcement. They are on scene and investigating,” Greenwalt continued. “We have no further information at this time.”

The New York location was later deemed safe, but authorities are still sweeping the L.A. headquarters — per The Hollywood Reporter.

One Twitter user who reportedly works at one of the offices claimed it was a “bomb threat,” but that has yet to be verified by local authorities or SAG-ATRA representatives. Another Twitter user said they witnessed nine bomb squad cars in the area.