Organisers of Cornwall's Boardmasters festival have issued a warning that drug use will not be tolerated.
The team behind the Newquay event, which runs from 8 to 12 August, say they are working closely with the police to ensure everyone stays safe.
The statement follows the recent deaths of two teenage girls in Devon and Cornwall which have been linked to ecstasy tablets.
A spokesman said: "As with anywhere in the UK, it is illegal to buy, sell or take drugs at Boardmasters. All drugs are potentially dangerous including new psychoactive substances (previously known as legal highs); there are no harmless drugs.
"Boardmasters festival organisers work closely with the local police authorities and other agencies to put procedures and proactive security measures in place to ensure the event maintains an enjoyable and secure environment for all its customers."
The festival team will be sharing safety messages across social media in the build-up to the event, with amnesty points set up where people can dispose of any drugs.
Anyone found in possession of drugs will be refused entry.
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