Sarah Guyard-Guillot, Sami Tiaumassi
(AP Photo/Las Vegas Sun, Leila Navidi)

A show in Las Vegas has been put on hold until further notice - after a deadly accident over the weekend.

FOX News Radio's Dave Anthony reports:

Performer Killed Las Vegas
(AP Photo/Las Vegas Sun, Leila Navidi)

It happened Saturday night during a performance of Cirque du Soleil's "Ka". An acrobat fell about 50 feet into an open pit below the stage:

(Witness) "When I saw the person falling, I thought most, most probably there's a net down there."

But there was no net to catch Sarah Guyard's fall:

(Witness) "You could hear the sobs and the crying of the artists."

The show stopped. The audience got refunds or vouchers. And the coroner's office in Las Vegas is determining how she died.

Cirque du Soleil is investigating the accident. It's founder says he's heartbroken. He and the MGM Grand Casino offered sympathy for Guyard's family, including her two children.

Dave Anthony, FOX News Radio.

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READ a statement from Cirque du Soleil:

"The entire Cirque du Soleil family is deeply saddened by the accidental death of Sarah (Sassoon) Guyard, artist on the production KÀ, that happened on Saturday, June 29th, in Las Vegas. The artist's immediate family has been informed of the accident.

Our thoughts are with her family and the entire Cirque du Soleil family.

"I am heartbroken. I wish to extend my sincerest sympathies to the family. We are all completely devastated with this news. Sassoon was an artist with the original cast of KÀ since 2006 and has been an integral part of our Cirque du Soleil tight family. We are reminded, with great humility and respect, how extraordinary our artists are each and every night. Our focus now is to support each other as a family. " said Cirque du Soleil Founder, Guy Laliberté.

We have been working with the appropriate authorities and have offered our full cooperation.

Performances of KÀ will be cancelled until further notice. "