THACKERVILLE, Okla. (KXII) -- Kevin Richardson, a member of the Backstreet Boys who were slated to play Saturday night at Winstar World Casino in Thackerville, Okla. tweeted around 6:30 that a tent collapsed and some people seeking shelter there were injured.
Witnesses say heavy rain and strong winds blew the tent where people were waiting on the show on top of people's heads.
The people at the front of the line were the ones that got hit by the falling metal, according to witnesses.
Emergency crews were called to the scene and concert goers were escorted to another location to wait out the storm.
One woman at the concert reported at least one person unconscious, one with a bloody head wound and at least seven transported in ambulances to hospitals.
People at the concert said Chickasaw Security did warn everyone before the rain started to take shelter in the casino or their vehicles until the storm passed.
No word on if the concert will go on as planned.
Kym Koch Thompson, WinStar World Casino and Resort spokesperson, released this statement Saturday night:
"At 5:00 p.m., WinStar World Casino and Resort officials began evacuation of the outdoor concert venue after observing that lightning was within four miles of the casino. All patrons in the area were asked to move and to seek shelter from the storm. However, about 150 patrons who were standing in line for the Backstreet Boys concert did not heed staff’s warnings.
At approximately 5:30 p.m., the storm hit and knocked over the concert entrance trusses with 70-80 mile an hour winds and heavy rain. 14 people were treated at the scene and then transported to local hospitals. Two have already been released.
Love County emergency responders, Lighthorse Police and Oklahoma Highway Patrol are on scene.
We know that fans often suffer through inclement weather for their favorite acts, but this was an unusual event and our thoughts are with those who were injured during this storm."