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By Erin Dean and Alex Johnson

Aerosmith guitarist Joe Perry fell ill during a concert Sunday night in New York and stumbled off stage, according to audience members and video verified by NBC News.

Emergency services officials said an ambulance was called to The Amphitheater on the Coney Island Boardwalk at about 9:40 p.m. ET. Perry's second band, the Hollywood Vampires — a trio with Alice Cooper and Johnny Depp — was performing at the time.

After the show, Cooper tweeted that Perry was stable at a hospital.

A police spokesman confirmed to NBC News that a 65-year-old man was transported by ambulance from the Amphitheater's address and was listed as stable. Perry, the lead guitarist for Aerosmith, is 65.

Audience video of the show posted to YouTube and verified by NBC News shows Perry sitting down on the front of the drum platform, then standing up and stumbling stage right behind a stack of speakers.

Kevin Phalon, an audience member, told NBC News that Perry collapsed during the second song of the band's set.

"He sat down during the song and then walked off behind the drum set," Phalon said. "After that, you could see a whole bunch of backstage people run off to the left side of the stage."

Postings on social media, apparently from other audience members, gave very similar accounts.

Phalon said the band finished the song. Then Depp and Cooper huddled onstage and continued the show with other guitarists filling in, but without playing any Aerosmith songs or performing an encore.

Meanwhile, Phalon said, a nearby audience member went to see what had happened and returned to say that someone was being treated with a defibrillator.

Billboard reported that Cooper told the audience: "If you notice one of our brothers is not onstage with us, he was very sick before the show."