West Australian police are investigating whether a 38-year-old man had been smoking a New Zealand synthetic cannabis, Kronic Black, before his death last night.
The man was taken to Rockingham Hospital, 47km southwest of Perth, last night, suffering a suspected cardiac arrest.
He was unable to be revived and died at hospital, The West Australian newspaper reported.
Police said he might have been smoking Kronic Black.
WA recently became the first Australian state to ban Kronic and similar synthetic-cannabis products - and a similar ban on sales is due to take effect in New Zealand next week.