Reading Festival is one of the U.K.’s biggest festivals and it took place last weekend, headlined by Stormzy and Liam Gallagher with an estimated 90,000 people in attendance.

Ticket holders were required to provide proof of double vaccination or a negative lateral flow test to gain entry. Once inside, revelers were then required to take a new lateral flow test every 72 hours.

However, reports that positive COVID-19 tests were found outside Reading Festival have emerged, prompting anger from social media users.

Local publication Berkshire Live reports that positive lateral flow coronavirus tests have been found strewn around outside when investigated by a reporter.

A number of TikTok videos from the event also purport to show positive lateral flow tests discarded on the ground.

These reports have prompted anger on social media, with commenters decrying attendees for potentially infecting others at the large scale event.

“And this people is how we get mass #covid infections at big outside events,” reads one tweet. “Just ask your mates to provide a negative test for you to show on entry and discard your positive test.”

While another person added: “This, I’m afraid, is why we can’t have nice things.”

Another tweet reads: “If you have a positive PCR and know you have COVID, then fake an LFT and go to a music festival or any other exposure to people, you need to take a long think about things.”

One festival-goer told Berkshire Live he was willing to take the risk of catching coronavirus to attend the event.

“When I arrived I knew there was a risk, but I thought, you know what, I’m happy to take that risk,” they said. “I’m not too fussed about getting it, but I don’t think my family would be too pleased about having to isolate. I think it’s bad about the positive tests lying around but it’s to be expected really. If I tested positive I wouldn’t go home as we’ve spent so much money to get here.”

Newsweek has contacted Reading Festival for comment.

Reading Festival-goers were offered the chance to get vaccinated at the event last weekend in pop-up clinics across the site.

This comes as some 4,700 COVID cases were suspected of being linked to the Boardmasters Festival in Cornwall two weeks previously.

Meanwhile, a video appearing to show the slack checking of vaccination cards at the entry point to the Lollapalooza festival in Chicago has also raised concerns.