St. Louis County police are warning about a new and dangerous synthetic drug that is showing up in the St. Louis area.

CLAYTON, Mo. (AP) — St. Louis County police are warning about a new and dangerous synthetic drug that is showing up in the St. Louis area.

Police said Tuesday that narcotics detectives have purchased the drug known as "N-Bomb," or legal acid, while working undercover.

N-Bomb is described as a very potent synthetic hallucinogen. Police say deaths have been reported in California, Louisiana, Minnesota, North Dakota and Virginia. So far, only Virginia and Louisiana have banned the substance.

Authorities say N-Bomb is a liquid typically soaked into blotter paper then placed on the tongue.