Police say the synthetic opioid carfentanil has been found in Nanaimo, a week after health officials confirmed the dangerous substance had been detected in street drugs in Metro Vancouver. R-C-M-P say a white powder was recently seized when officers executed a search warrant in Nanaimo, and tests done by Health Canada confirm the presence of the drug. Constable Gary O’Brien says an amount of carfentanil as small as a grain of sand could be fatal. The opioid is used as a sedative on large animals like elephants and is more powerful than fentanyl, an opioid linked to hundreds of illicit drug overdose deaths in B-C last year.