Five senior college students accused of ragging a younger student at a polytechnic college in Nattakam in Kottayam district have surrendered before the police to cooperate with the investigation.

Earlier, a student names Avinash from Iringalakkuda in Thrissur was admitted in hospital after he was allegedly asked to strip and perform physical exercises in the nude for about six hours. He was also allegedly forced to drink tainted liquor by the seniors at the boys’ hostel, which caused serious damage to one of his kidneys. He had to undergo dialysis.

The five senior accused students, Jerin, Saran, Manu, Raison and Jayakrishnan, arrived at Changanassery DySP office along with their parents and lawyers to surrender.

According to the police, three more students have to be arrested in the case.

Avinash was admitted in Thrissur hospital on December 4 after his condition turned worse. He had told The News Minute that he was bleeding while urinating.

Meanwhile another student from Ernakulam has also filed a police complaint against the senior students. Shaiju D Gopi has complained that he and other junior students including Avinash were forced to do 50 push-ups and 100 sit-ups on the night of December 2.

Former Chief Minister Oommen Chandy had visited Avinash at a Thrissur hospital and had urged the government to bear the medical expenses.

The state human rights commission has also sought explanation from the education institution.