Entrance trusses collapsed while organisers were evacuating the venue as bad weather approached.
The company says about 150 fans did not evacuate, and when the storm hit with 70-80 miles per hour winds, it knocked over trusses and the entrance collapsed on them.
At least 14 Backstreet Boys fans have been injured after a metal structure at an outdoor concert venue collapsed in a storm in the USA state of Oklahoma. When the outdoor venue was hit by the turbulent weather, the storm's intensity knocked over a metal entrance structure causing numerous show's attendees to be injured. "I could see everyone so patiently waiting again in line from the window in my room and it broke my heart seeing everyone leave when they got word the show had to be canceled", he said.
His bandmate Kevin Richardson referred to the structure as a "tent" and tweeted before the band's Saturday show that severe weather had passed through Thackerville causing the metal structure to come down. Richardson later tweeted that the concert had been canceled because of the storm and injuries to fans.
"All patrons in the area were asked to move and to seek shelter from the storm", casino spokeswoman Kym Koch Thompson said. Waiting to determine damage to our stage and production. "Status of show TBD".
The Backstreet Boys, often referred to as BSB, formed in 1993 and rose to fame in the late 90s.
He tweeted: '...weather wasn't are friend tonight.... keep your tics cause Backstreet will be Back...(sic)'. They say there are NO serious injuries at this time.