A drug which can kill humans with just one dose has been discovered on the streets of America.
Cases of people taking an overdose of the drug have been reported in Alabama, Ohio and Georgia, according to RT.
At least 50 people have died as a result of the drug, which has been given the name 'Grey Death'.
It can either be injected, inhaled, swallowed or smoked and is available for only $10 (£7) on the streets.
The drug contains heroin, fentanyl and carfentanil, which is normally used on large animals like elephants to give them reassurance in stressful situations.
It is a highly addictive substance and can be a dangerous to people - even if they only touch it.
Director of chemistry at the Georgia Bureau of Investigation Deneen Kilcrease has claimed it is the most gruesome combination he has seen, despite working in the field for 20 years.