Tibetan spiritual leader the Dalai Lama has said the centuries-old Tibetan Buddhist institution will continue after his death, ending speculation ignited by his remark that he might be the last person

At Mongolia's largest monastery, worshippers pray alongside pictures of the Dalai Lama, whose 90th birthday on Sunday has raised fresh questions about the future of the 600-year-old Tibetan spiritual institution.

The 14th Dalai Lama turns 90 on Sunday and is expected to give his clearest signal yet on how his reincarnation will be determined at the event in Dharamshala, India, where the Dalai Lama has lived since fleeing Tibet in 1959 after a failed uprising against Chinese rule.