Police say there have been six suspected drug-overdose deaths in Durham Region in the past three weeks and are warning users of street-level narcotics to be careful.
Investigators say they're working with the coroner's office to determine the exact cause of the deaths, which are undergoing toxicology analyses.
But police say evidence suggests illegal narcotics were involved.
Durham police say it's too early to determine whether the deaths are linked to a bad batch of heroin in Toronto late last month that caused a number of overdoses and one death.
Investigators are reminding users that street-level drugs mixed with dangerous additives can be deadly.
This content appears as provided to The Globe by the originating wire service. It has not been edited by Globe staff.