On Saturday night, concertgoers were left stranded outside Pennsylvania’s Keybank Pavilion awaiting a Jimmy Buffett concert after the singer took the stage. Following the security mess, fans are demanding ticket refunds.

“Parrotheads” took to Twitter, showing pictures of a stand-still line, although the concert had already started an hour beforehand. Some fans explained that they paid $100 to park, then waited in line for more than two hours only to hear a handful of Buffett’s songs. Others never even made it into the venue.

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It was not clear why the lines were so long. Gates were scheduled to open at 6:30 p.m., six hours after the venue’s parking lots opened for vehicles. According to TribLive, messages to the concert venue and Live Nation were unreturned until late Sunday night. When Live Nation responded, the company did not explain what caused the delays, but encouraged fans to reach out to Ticketmaster’s Fan Support.

“During last night’s show, some fans experienced longer than normal wait times,” Live Nation said in the statement. “We apologize for the inconvenience and frustration this may have caused and will continue working hard to prevent situations like this from happening again in the future. Any fans who experienced delays are encouraged to reach out to Ticketmaster Fan Support.”

Paul Coultas, owner of Paul’s Party Bus, told KDKA-TV that he had never seen something so unorganized. Coultras brought a small van of 12 Parrotheads to the show, and paid $100 to park. He noted that fans were ushered through metal detectors at the gate, but weren’t pushed through before showtime, leaving concertgoers waiting shoulder-to-shoulder in line for hours.

“I don’t know if anything was broken, but I just think their process of getting people through is a bad process, because the show I was at in June, they didn’t have metal detectors and it was still a bad entrance,” he said. “It took the people almost as long and it was a show with half as many people.”

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Fans who missed part of the show due to the extreme wait time can reach Ticketmaster at 800-653-8000 or Ticketmaster Fan Support on Twitter at @TMfanSupport. It is unknown at this time if any tickets have been refunded.

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