Toronto police are warning the public about a deadly form of heroin being sold in the city after receiving reports of drug overdoses in recent days.

In a statement Saturday morning, police said they'd received reports of numerous overdoses. One of the instances was fatal.

"It appears that the common link is a deadly form of heroin being sold," the statement said.

Dr. Clement Sun, medical director at Addiction Centre Toronto, has been monitoring this new wave of heroin. He is concerned dealers may increasing the potency of the drug in order to sell more.

"With this wave of injuries and deaths from heroin, we're afraid that they could be mixing other products in there to give it more kick to be able to sell it," he said.

"Who they injure is not a concern to them."

If heroin users encounter serious physical illness, they are advised to attend a clinic or hospital immediately for treatment.

Anyone with more information is asked to contact police at 416-808-1300, or call Crime Stoppers anonymously at 416-222-8477(TIPS).

With a report from CTV Toronto’s Ashley Rowe