They were arrested after the 2012 Drago protests.

Tibet Watch said in its report that it has learned that three senior monks from Drago Monastery are still severely ill after their release from prison four years ago.

The three monks, Tsewang Namgyal, Tengya, another monk whose identity is kept confidential for security reasons, served six-year prison sentences from 2012 until their release in January 2018, reports Tibet Watch.

The news of their failing health comes as their home county of Drago faces rising tensions due to a series of arbitrary detentions and demolitions.

The county is also under close surveillance by Chinese authorities, reported the news portal.

The monks are suffering from a range of serious conditions as a result of inadequate food, torture, and forced labour in prison including crippled legs, organ damage, insomnia, constant headaches, and loss of mobility.