Tibetan exile sources tell VOA (Tibetan service) that two more Tibetans have set themselves on fire to protest Chinese rule in their homeland.

They say the self-immolations took place Monday evening local time in the Ngaba region of Sichuan province, neighboring Tibet.

No other information was immediately available.

The latest immolations bring to about 50 the number of Tibetans who have set themselves on fire since March of 2009 in protest of Chinese rule in Tibet.

Tibetans have grown increasingly frustrated about what they see as the Chinese government's limitations on their religion and culture — a charge Beijing denies.

The Chinese government has described the self-immolations as barbaric terrorist acts. It accuses overseas groups and Tibet's exiled spiritual leader, the Dalai Lama, of inciting separatism.