An autopsy conducted on a security guard who was arrested in Gombak yesterday had determined that he died of a heart attack, according to Selangor police.

Selangor police chief Arjunaidi Mohamed in a statement said post-mortem on the 43-year-old, who died just an hour after being arrested by Gombak police, was conducted at Hospital Kuala Lumpur this morning.

"An inspection of the body...