PUTTAPARTHI, India (AFP) - Sathya Sai Baba, one of India's most famous gurus, died in hospital on Sunday, triggering a global outpouring of grief and tributes from devotees across politics, sport and entertainment. He was 85 and finally succumbed to multiple organ failure after being in a critical condition for more than three weeks, his doctors said.Thousands of Hindu followers massed at the Institute of Higher Medical Sciences hospital where Sai Baba had been treated in his hometown of Puttaparthi, in the southern state of Andhra Pradesh. Police used barriers to hold back crowds of mourners and appealed for public calm after the death was announced. "Sai Baba is no more with us physically. He breathed his last at 7:40 am and died due to cardio-respiratory failure," a statement from the hospital said. "His body will be kept for public worship for two days on Monday and Tuesday." Devotees had congregated in the town over recent weeks to hold special prayers asking for a miracle to allow Sai Baba to recover. He was credited by millions of people across the globe with having supernatural powers, including an ability to conjure objects out of thin air, remember past lives and cure terminal diseases.