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Rock star Marilyn Manson was injured during a concert in New York when a large piece of stage scenery fell on him on stage.

The prop - apparently two large guns held together with metal scaffolding - fell as he was performing at the Hammerstein Ballroom on Saturday.

An eyewitness told the ´óÏó´«Ã½ that the singer lay on stage for up to 15 minutes covered by a sheet before he was carried out on a stretcher and taken to hospital.

He has cancelled nine tour dates following the injury, according to .

Eyewitness Anthony Biscardi told the ´óÏó´«Ã½ that fans at the concert "instantly freaked out".

"He was performing the song Sweet Dreams. Towards the middle of the song it seemed as though he tried climbing onto a prop.

"The first touch of weight on those poles and it came crashing down onto him."

In videos of the incident posted online, stage crew and band members can be seen lifting the prop off the singer but he does not get back up.

"He was pretty limp, almost as though he was unconscious," Mr Biscardi said.

Mr Biscardi said a black sheet was put around him until he could be taken off stage, when an announcement was made that the show was cancelled "due to injury".

A representative told magazine that: "Manson suffered an injury towards the end of his incredible NYC show. He is being treated at a local hospital."

The 48-year-old artist was three dates into his The Heaven Upside Down Tour. He was due to perform in Boston on Monday night.