Police have named Lewis Haunch from Greater Manchester as the 17-year-old who died after taking drugs at Leeds Festival.
Two 17-year-old males are in custody after being arrested in the Greater Manchester area on suspicion of drugs offences.
Chief Superintendent Keith Gilert, Leeds Festival's police commander, said officers will continue to support Lewis's family. He also issued a warning to festival-goers about the dangers of illegal drugs, and said they would continue to take action against those supplying drugs to others.
"Taking any illegal drug carries a risk to health and we would always advise people against it, but I would ask that people are particularly conscious of the risks following this young man's death."
Hayley Briggs was at the festival and said she believed she saw Lewis as he was being treated by medics.
She said: "It was right outside the guest area and the guy just looked in a very bad way. He was ashen, head-to-toe grey, totally not with it at all.
"He was being cradled by one of the first aiders before the ambulance arrived. He looked as if he was going in and out of consciousness. Poor kid, it's really sad."