Sinead O'Connor has been reported as missing. The Nothing Compares 2 U singer is said to have gone out for a bike ride on Sunday morning but hasn't been seen since.
A brief press release from Wilmette Police stated that Sinead "left the Wilmette area" at six o'clock in the morning. The suburb is roughly 14 miles north of downtown Chicago.
Police are apparently "seeking to check the well-being" of the star. No more information is available at the time.
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Sinead O'Connor went out for a bike ride on Sunday
TMZ went on to report that Sinead, 49, was riding a Raleigh motorised bicycle with a pink basket. She was wearing a black parka, black leather pants and a sweatshirt with "Ireland" on the back.
The American publication noted that concerns are growing for the Irishwoman's state of health.
Last December, Sinead posted a series of disturbing messages on Facebook stating she had taken an overdose. Her friend, singer Mary Coughlan, confirmed that she was in a stable condition and being cared for in hospital.
Sinead's post on Facebook read: "There is only so much a woman can be expected to bear. The last two nights have finished me off. I have taken an overdose. There is no other way to get respect. I am not at home, I'm at a hotel, somewhere in Ireland, under another name."
Police are "seeking to check the well-being" of the star
Sinead rose to fame in 1990 when her hit single Nothing Compares 2 U – a new arrangement of Prince's song – achieved worldwide success. She has completed ten solo albums throughout her musical career.
The star is a mother of four; she first became pregnant when she was 20. She had a son Jake and married his father, musician John Reynolds. After they broke up, she began a relationship with political journalist John Waters, the father of her second child Roisin.
Sinead's next marriage in 2002 was to journalist Nick Sommerlad.
Her third child, Shane, was with another singer, Donal Lunny, and nine-year-old son Yeshua is the result of a romance with American businessman Frank Bonadio.
In 2011, she married drug counsellor Barry Herridge; they split 16 days later, but reunited.