The heroin may be polluted

The alert comes after two addicts died from overdoses which drugs counsellors fear stemmed from a polluted batch of the drug which smells like diesel fuel.

Workers at The Garage counselling service believe a contaminated batch of the drug, known as "Red Heroin" is circulating in the town, brought over from Sheffield.

Earlier this month Samantha Willey, 26, died at Doncaster Royal Infirmary and Ryan Johnson, 20, a homeless man, died at the Balby Bridge area of Doncaster.

Both deaths are feared to be linked with the batch.

Warnings have been put up at The Garage offices in Thorne Road, Doncaster, advising users of the contaminated batch.