A day after a 23-year-old man died of a suspected overdose of alcohol after collapsing at a party on a mall terrace, Tirumangalam police said his viscera samples have been collected and sent to the forensic lab to ascertain the cause of death.

Even though no drug was seized in the raids conducted by the prohibition enforcement wing police, who stopped the party halfway, police did not rule out the possibility of the use of drugs by participants in the party.

The post-mortem of the deceased, S Praveen of Madipakkam, was carried out at the Kilpauk Medical College Hospital on Sunday and handed over to his parents.

While police sealed two bars for misusing the licence, no further arrests have been made apart from three persons, who were managers and the event in charge of the bars. A police officer said that other suspects are on the run.

About 900 youngsters had gathered at the party on the rooftop of the mall without police permission, Praveen allegedly collapsed on the dance floor on Saturday and succumbed at Rajiv Gandhi Government General Hospital on Sunday.

Police did not rule out the possibility of use of banned substances by participants at the party on mall terrace