A rogue batch of ecstasy tablets have been recovered by police at T in the Park.
The so-called Green Rolex type pills were linked with several deaths in 2013.
However, police chiefs said the tablets may not be linked with the deaths of two 17-year-olds at the start of the festival.
A Police Scotland spokesman said: “We have recovered a small number of Green Rolex-type pills at T in the Park and are warning festival goers to beware of any others that may be in circulation.
“Pills similar to these have caused serious harm in the past although there is no evidence at present to link these to any other incidents at the festival.”
He added: “We want to remind people there is no safe way of taking drugs and T in the Park has a zero tolerance drugs policy.
