New Delhi, India (CNN) -- Famed Indian spiritual guru Sri Sathya Sai Baba died Sunday of respiratory failure, his doctors said.
He was 85.
The orange-robed spiritual leader with a puff of dark hair is considered a living god by his followers in India and overseas.
His followers believe he has supernatural powers. However, critics have accused him of fraud and sexual abuse, allegations he has denied.
The guru claimed to be a reincarnation of Sai Baba of Shirdi, one of India's greatest spiritual figures, who died in 1918.
Sri Sathya Sai Baba was hospitalized last month in his southern India hometown of n Puttaparthi.
Authorities have tightened security around the town since his condition started worsening.
In a hospital bulletin, doctors did not use the word death to announce his passing.
It said he was "no more with us physically" and that he left "his earthly body" on Sunday.
Indian Prime Minister Manmohan Singh expressed his condolences and said the nation mourns his passing.
He inspired millions to lead a meaningful life regardless of their religions, the prime minister said.
"His teachings were rooted in the universal ideals of truth, right conduct, peace, love and nonviolence," he said. "I express my sincere condolences to the millions of his followers, disciples and well wishers."
The guru has set up various health, education and charity organizations.
His body will lie in state for two days so his followers can pay their respects, according to the hospital, which is funded by his organization.