Reading Festival has issued a drug warning to attendees following the discovery of “high strength” Donkey Kong pills. The warning comes one day after a 17-year-old girl reportedly died of a suspected drug overdose at Leeds Festival yesterday morning.

You can read the festivals warning to its attendees below.

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The festival took to Twitter to reveal the circulating drugs found at the site were Donkey Kong pills, otherwise known as 250mg MDMA tablets.

“READING: Donkey Kong pills have been found in circulation at Reading. These are very dangerous, high strength pills, up to 3 times the normal average adult dose.”

READING: Donkey Kong pills have been found in circulation at Reading. These are very dangerous, high strength pills, up to 3 times the normal average adult dose. — Reading & Leeds Fest (@OfficialRandL) August 25, 2019

Later, the festival shared their drug policy reminding festival-goers that “Mixing drugs with other drugs / alcohol / prescription drugs can be very dangerous.”

Mixing drugs with other drugs / alcohol / prescription drugs can be very dangerous. Know the facts: https://t.co/RtweuFMELQ — Reading & Leeds Fest (@OfficialRandL) August 25, 2019

Yesterday, it was reported that a 17-year-old girl died of a suspected drugs overdose at Leeds.

West Yorkshire Police are reporting the teenager from Oldham died shortly after 03:40 BST at the Bramham Park Site.

A 17-year-old boy from the same area was arrested on suspicion of supplying the drugs.

Read more: Leeds Festival attendee dies of suspected drug overdose

The festival’s police commander stated the exact cause of the death hasn’t been determined but it appeared the girl had “taken a combination of drugs.”

The Leeds Festival Police Twitter account issued a similar warning to the public about some drugs on-site carrying “three times the normal average adult dose.”

Please be aware of the following named substances Donkey

Kong, Trump and Skype pills. They have been found in

circulation onsite. These are very dangerous, high strength pills, up to 3

times the normal average adult dose. pic.twitter.com/mLDnDO5JUI — LeedsFestivalPolice (@LeedsFestPolice) August 23, 2019

“To say we are deeply saddened about this tragedy is an understatement,” said Melvin Benn, a representative for organizers Festival Republic.

“West Yorkshire Police have taken action against those that may have supplied the drugs, and we will continue to work with them as usual.”