(STMW) — Chicago Police are confirming that they are on the lookout for pop singer Sinead O’Connor, who may be threatening suicide.

The celebrity went missing for a 24-hour period in May while staying at a home in Wilmette, and was later found safe.

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Chicago police received a call from police in Dublin, Ireland, stating that O’Connor had threatened to jump off a bridge in Chicago, the Chicago Sun-Times is reporting. Concerns prompted the Chicago Police Department to issue an “All Call” alert Thursday advising officers to be on alert for the 49-year-old singer. A department spokesperson said no officers have been assigned to the search, but all cars have been notified to be on the lookout.

The alert came across Chicago Police scanners Thursday during the height of the evening rush hour (and was repeated 90 minutes later):

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“All units stand by for the All Call message. … Word from Ireland police Sergeant Claire Mulligan, Dublin, Irleand, is saying that at 15:30 hours Sinead O’Connor called and said ‘I’m on a bridge in Chicago and I’m going to jump’. If officers could keep an eye out for the celebrity.”

A call to the Dublin, Ireland (Garda Síochána) police, yielded no comment.

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(Source: Sun-Times Media Wire copy; Chicago Sun-Times 2016. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)