Police have confirmed receiving reports regarding the deaths of four individuals who attended a concert in Bandar Sunway, Subang Jaya, yesterday.

Selangor police chief Hussein Omar Khan said Universiti Malaya Medical Centre lodged police reports involving all the victims, including two women aged between 20 and 40.

Post-mortem examinations were conducted today, he said, but the cause of death is "pending laboratory investigation."

"No external injuries were detected, and the cases have been classified as sudden death.

"However, investigations are ongoing to determine if there are any criminal elements or poisoning involved in the deaths," Hussein said in a statement today.

The public with information regarding the incident is urged to contact investigating officer Mohd Ridzal Puat at 03-56382122 or provide information to the district control centre at 03-78627222 to assist in the investigation.

- Bernama