A bomb threat investigation forced authorities to close roads near Providence St. Jude Medical Center in Fullerton on Sunday.

According to the Fullerton Police Department , "several roads" were closed for the investigation, although the streets affected weren't specified. The investigation was first announced just after 11:30 a.m.

As of 12:31 p.m., it wasn't yet clear if the threat was substantiated. CBS LA reached out to St. Jude for clarification, but had yet to hear back.

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