Neil, 52, fell ill with suspected kidney stones during a performance in Australia and had to be taken to the emergency room to receive care.
Nikki Sixx apologized to fans on the social media site, writing:
Sorry Sydney for a short set tonight but Vince had to be rushed to the hospital for internal pain. Will update you on his progress.
Motley Crue member Mick Mars also took to Twitter to apologize to concert-goers, explaining, "Vince had an attack of kidney stones. He went straight from stage to the hospital."
Motley Crue is currently touring Australia with fellow rockers Kiss and Thin Lizzy. The group was playing a second gig at Sydney's Allphones Arena when Neil started experiencing pain.
Here is what yahoo news reported:
Mötley Crüe were forced to cut short their concert in Sydney on Sunday night when singer Vince Neil was hospitalized for a kidney stone attack.
According to Setlist.fm, the band was nine songs into their set when Nikki Sixx announced that Neil had been in pain throughout the show and needed to be taken to the hospital. Guitarist Mick Mars later apologized for the interruption on Twitter and explained the trouble with his bandmate's kidneys.
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"He has been having problems for the last few days with kidney stones," the band's manager, Allen Kovac, told CNN. "He was treated at the hospital after the show. It's the middle of the night there, and we will know more later."
Kovac, who called the 52-year-old singer a "warrior," said that the band is still planning to perform as scheduled on Tuesday in Brisbane. "If there is a way to safely perform, [Neil] always does," he said. "In nearly 20 years of managing Motley Crue, I can't recall a show the band has canceled.