South Hackensack Police Captain Robert Kaiser said officers went to the Travelodge where she filmed the Facebook video, but O’Connor wasn’t in her room at the time.
Kaiser said the Irish singer is no longer staying there and police were not aware where she is currently living.
But a follow-up Facebook post has insisted the 50-year-old is ‘safe’.
“Hi everybody, I am posting at Sinead’s request, to let everyone who loves her know she is safe, and she is not suicidal. She is surrounded by love and receiving the best of care.”
O’Connor rose to fame in the 1990s with her version of Prince’s “Nothing Compares 2 U”.
Conversations around mental health have drawn national interest due to the recent deaths of well-known people who have taken their own lives, such as Chester Bennington (the lead singer of Linkin Park).
The Netflix television series “13 Reasons Why” sparked backlash for glorifying a teenage girl’s suicide whose death is shown in graphic detail in the series.