A dangerous batch of heroin is thought to be circulating in the Neath Port Talbot areas.

South Wales Police and local drug agencies are warning drug users to be extra cautious after a heroin user tested positive for Fentanyl following a non-fatal overdose this week.

Fentanyl is a highly toxic synthetic opioid approximately 100 times more potent than morphine and 50 times more potent street heroin.

As little as 0.002g of fentanyl (within a typical 0.1g heroin deal) is potentially fatal.

Detective Inspector Stuart Johnson said: “Class A drugs, by their very nature, are dangerous and unpredictable due to their varying potency and purity.

"However, the detection of fentanyl is extremely concerning because of its extreme strength and I would urge all drug users in the area to be cautious and to seek advice and support from local support services in order to try and protect themselves.”

The Wales Drug and Alcohol Helpline - 0808 808 2234 – provides a free and bilingual single point of contact for anyone in Wales wanting further information or help relating to drugs or alcohol.

Anyone with any information about the sale of illegal drugs in the area is urged to contact 101. Alternatively, Crimestoppers can be contacted anonymously via 0800 555 111.