Jeremih was set to kick off a U.S. tour with opening acts Mila J and Candice Boyd this past Friday, but just two days before, he let fans know some disappointing news.

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“To all my Fans: Due to unforeseen circumstances, I will have to postpone my US Tour,” the Late Nights singer tweeted. “An announcement of new dates will be provided soon. Thank you for rocking with me. #LateNights.”

No word on the cause or when the new dates will be announced, but we’ll keep you updated. (What do you think it was?!)