Police have warned that the deadly drug Fentanyl could be circulating on the streets of Neath and Port Talbot.
South Wales Police and drug agencies are urging drug users to be extra cautious after a heroin user tested positive for Fentanyl following a non-fatal overdose this week.
Fentanyl is 50 times more potent street heroin. A tiny amount, 0.002g is enough to kill.
There were 3 Fentanyl deaths in Wales last year.
Neath and Port Talbot has one of the highest drug death rates in the UK.
Earlier this year Kyle Enos from Newport was jailed for 8 years for supplying Fentanyl.
Police are urging drug users to protect themselves.