Fourteen concertgoers were injured on Saturday at the Oklahoma Ave. official said.

About 150 concertgoers were waiting in line at the WinStar World Casino and Resort at Thackerville when the storm struck at 5:30 pm CDT, according to the resort.

The injured were treated at the scene by Love County, Oklahoma, paramedics and others who responded along with police and highway patrol officers , They were taken to local hospitals.

"We know that fans often suffer through the weather for their favorite acts, but this was an unusual event and our thoughts were with those who were injured during this storm," Kym said Chef Thompson, a WinStar spokeswoman.

The Concert by Backstreet Boy and 98 Degrees was canceled. Officials said it would be rescheduled at a later date.

Throngs of fans and emergency vehicles. One of the Backstreet Boys, Kevin Richardson, tweeted that emergency crews were on the scene after a tent collapse and were injured. Hey said 12,000 fans had been expected for the concert.

He later tweeted that safety inspectors were checking the structural integrity of the stage

Officials say they had seen the concert and listened to the concert. They watched lightning about 4 miles away. Those still in line "did not read staff's warnings," the resort's statement said.

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