BEIJING — Two young Tibetan monks set themselves on fire on Monday at an embattled monastery in western China to protest Chinese policies in the area, according to a Tibet advocacy group. The monks were apparently taken to a hospital, and it was unclear what condition they were in on Monday night.

The monastery, Kirti, in a remote area of Sichuan Province, has been the site of at least four recent self-immolations, including the two on Monday.

The latest monks to set themselves on fire were Lobsang Kalsang and Lobsang Konchok, both estimated to be 18 or 19, according to Free Tibet, the advocacy group, which is based outside China and often tries to gather its information from people within the Tibetan areas. Lobsang Kalsang is the brother of Phuntsog, a young monk from the same monastery who killed himself in March by setting himself on fire.

The advocacy group said the two monks called for religious freedom and shouted “Long live the Dalai Lama!” before they self-immolated.