Local government and tourism committee chairman Ng Suee Lim said scanning machines could also be used to prevent prohibited substances from being brought to a concert.

“Previously, when I went to Genting Highlands to watch the Kitaro concert, everything was checked, including by scanning machines. Even our wallets had to be emptied,” he said, reported Kosmo.

“Maybe now, concertgoers’ urine should be checked as well. This could be one suggestion so that drug users are not allowed to enter concerts.”

He said the issue would be discussed at Wednesday’s state government meeting.

On Jan 3, Selangor police chief Hussein Omar Khan said police had suspended permits for concerts in the state.

He said organisers need to assure the authorities that they can prevent drugs from being smuggled into the concert venues.

The four who died at the event at Sunway Lagoon on Dec 31 were suspected to have taken ecstasy, although investigators are still waiting for the toxicology analysis report for confirmation.