Australian police on Friday arrested five teenagers in connection with the recent spate of attacks on Indian students in Melbourne, and charged one of them for attempted murder.

A 17-year-old boy was charged with attempted murder after four Indian students, including Sravan Kumar, were brutally attacked by gatecrashers at a party in Melbourne's north on Saturday night, according to the Victorian police.

Kumar, 25, who was attacked with a screwdriver at a birthday party continued to remain critical and is still on life support.

Another 18-year-old was questioned in relation to the attack but has since been released.

Police also charged four minors in another case involving the brutal bashing on a train of a 21-year-old Indian student while he was on his way home on May nine.

The teenage boys are due to be produced before a juvenile court later on Friday and as per the rules the boys have not been identified.

They have been charged with offences including affray, intentionally causing injury, recklessly causing injury and robbery, the Victoria police said in a statement said.

Kumar's close friend Srinivas Korna, who is keeping a vigil at his hospital bedside, said he was still under intensive care but has started receiving utmost attention after media outrage over the attacks.

Korna said a special doctor has been assigned for Kumar.

Indian High Commissioner Sujatha Singh visited Kumar and was also scheduled to meet two other injured students in Melbourne and Canberra each. She said that his medical bills will be completely covered despite his lapsed insurance.

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