Two more Tibetans are reported to have set themselves on fire in Tibetan areas of China, in protest against Chinese rule.
A monk named Lungtok and a man identified as Tashi set themselves alight in Aba, Sichuan province, on Monday evening, said Tibetan sources.
Clashes between Chinese security personnel and Tibetans reportedly broke out following the self-immolations.
More than 40 Tibetans have set themselves on fire in the past year.
Five - these two men and three previous protesters - have self-immolated in the last 10 days alone, say campaigners, in what appears to be an escalation of Tibetan protests inside China.
An unconfirmed report says one Tibetan was beaten to death.
'Batons spiked with nails'
Twenty-year-old Lungtok and 21-year-old Tashi "set themselves on fire inside a prayer-wheel hut near Kirti Monastery in Ngaba Town", reported campaign group Free Tibet, using the Tibetan name for the town which China refers to as Aba.
"Once they were in flames, [they] came out of the hut and walked towards the street now known as Martyrs' Street," overtly linking their action to the protests of previous self-immolators, it said.
Chinese paramilitary police quickly moved in with extinguishers, local sources said, and whisked away the two men. Free Tibet said Lungtok died and Tashi's condition was unknown.
Multiple reports suggest that following the self-immolations Tibetans began to demonstrate and their numbers quickly increased.
"Eyewitnesses report that some demonstrators were beaten with metal batons spiked with nails and that some people were dragged away," said Free Tibet.