Authorities warn about drug that can be mistaken for water

South Dakota authorities are warning students and college officials about a drug that can be mistaken for tap water.

The Argus Leader reports the state's Division of Criminal Investigation is looking into South Dakota's first confirmed report of the drug known as 25i. In its liquid form, the synthetic, hallucinogenic drug is clear and colorless.

Division spokeswoman Sara Rabern says authorities came across the drug in southeast South Dakota, but couldn't give more details because of an ongoing investigation.

The U.S. Drug Enforcement Administration linked the drug to at least 19 deaths between March 2012 and August 2013.

The DEA says the substance and its related compounds are "substantially more potent than other hallucinogenic compounds" and even small amounts can cause seizures, cardiac and respiratory arrest, or death