Warning over 'street Valium' laced with Rohypnol in Scarborough

Police and medical staff say they are receiving a growing number of calls from drug users in the Scarborough area who have overdosed on so-called street Valium. The substance has been found to be laced with Rohypnol - which causes the user's mouth and tongue to turn blue.

Some users have been hospitalised after taking the drug - and police are now warning about the potential health risk.

Anyone with any information can pass the information on anonymously through Crimestoppers on 0800555 111 or contact North Yorkshire Police on 101.