Bukit Aman integrity and standards compliance department (JIPS) director Azri Ahmad said the 49-year-old man’s post-mortem conducted at Hospital Sungai Buloh at 4.20pm also found that the deceased tested negative for Covid-19.

“The results of the post-mortem found that no criminal injuries were detected and the cause of death is pending laboratory investigation.

“The man was arrested on Thursday under Section 12(2) of the Dangerous Drugs Act 1952. At 3.30am on Friday, personnel on duty found the man lying face down and unconscious and the medical team was immediately contacted to check on him.

“At 4.40am, an assistant medical officer attended to the man and confirmed his death,” Azri said in a statement.

He added that Bukit Aman’s criminal investigation unit on deaths in custody will continue the investigation from various angles before handing over the results of the investigation to the coroner.