Indian spinner Harbhajan Singh, whose nephew Upkar Singh was found dead under mysterious circumstances in Melbourne, appealed to the Indian government to ensure the safety of students in Australia.

'I request the authorities to ensure that the guilty are brought to book and my nephew gets the justice he deserves. He was a young and dynamic individual who had chosen to go to Australia for studies and was diligently pursuing a successful career and was an asset to the community in Australia,' Harbhajan, who is here to play in the World Twenty20, said in a statement Monday.

Upkar's body was found near the railway track near his apartment in the Thornbury area of Melbourne May 7. His father said the Australian police had not even conducted a post-mortem examination and closed the case, terming the death a suicide.

Harbhajan alleged that the Australian authorities are yet to disclosed the cause of Upkar's death.

'We were informed that Upkar committed suicide, but in the death certificate they didn't mention the cause of his death. Our family can't accept suicide claims made by police as Upkar was quite happy in Australia and was almost settled there,' he said.

There have been four attacks on Indian students in quick succession, with the first incident reported May 9.

Hospitality graduate Rajesh Kumar received 30 percent burns a week ago after someone hurled a petrol bomb through the window of his Harris Park home in Sydney. Three attacks on Indian students took place in Melbourne