Dyfed-Powys Police have issued a warning ahead of the bank holiday weekend about a “particularly harmful batch” of cocaine currently circulating.

The police believe a batch of drugs being sold of cocaine has been laced with fentanyl - an opiate considered to be up to 50 times more potent than heroin. Even in small doses, it can be deadly.

Fentanyl is a powerful synthetic opioid analgesic. Although fentanyl is abused as a substance in its own right, it is more commonly detected as an additive in other drugs.

“We appeal to drug users to seek medical attention immediately if they become unwell,” the police wrote on social media.

“Please share this information with anyone you believe could come into contact with these drugs.

“In an emergency, or if you think someone’s life is at risk, always dial 999.”