Toronto Police are warning anyone who might use it that a quantity of street-level heroin being sold is deadly. In the past 24 hours, police officers have been called to a number of heroin overdoses, one of which was fatal. It appears that the common link is a deadly form of heroin that is being sold. If heroin-users encounter serious physical illness, they are advised to attend a hospital emergency room or a walk-in clinic immediately for treatment. For a referral to a substance-abuse treatment facility, the Centre for Addiction and Mental Health can be reached at 1-800-463-2338.