A man and a woman were both found dead, and reportedly their deaths are unrelated
A man and a woman have died in separate incidents at the T in the Park festival in Perthshire.
The deaths at Strathallan Castle are being treated as unexplained, Police Scotland said.
"Work is ongoing to establish the exact circumstances of both," a police statement said.
The three-day event begins today, but campers started arriving on Thursday.
Liz Smith, Scottish Conservative MSP for Mid Scotland and Fife, said: "This is tragic news and I am sure I echo the sentiments of everyone when we send condolences to the families involved and, indeed, to the organisers of T in the Park who have worked hard this year to overcome last year's concerns about public safety."
The Stone Roses will headline the festival on Friday. Calvin Harris and the Red Hot Chili Peppers will also perform over the weekend.
T in the Park, which began in 1994, moved to Strathallan Castle in 2015.
It is Scotland's biggest music event and is expected to attract more than 80,000 people.