'It's Scary' West Palm Beach Police Call New Drug 'Public Safety Threat'

A designer drug that's 50 times more deadly than fentanyl has been found in South Florida.

West Palm Beach Police say the drug "ISO" is being produced to look like a run-of-the-mill opioid, but it's far more potent and the department is calling it a 'public safety threat.'

"If you go to a drug dealer on the street and you say 'Let me have 10 Oxys', they're giving you this, you're thinking you're getting Oxycontin and in reality you're getting fentanyl. So you take two of these, you're dropping. It's gonna kill you."

Lieutenant Joseph Herb tells CBS 12 News that NARCAN may not be effective against it.

20 kilograms of the drug were seized after being found in a home and storage unit. Herb says it has a street value of about $1.6 million.

One arrest was made, but there are no details on that as Herb says the investigation continues.

Herb says the drug is made by mixing fentanyl with opioids and then dispensed in powder, pill, crack or brick form.

Investigators believe the drugs are coming from Mexico through the southern border in Texas. Herb says the only other U.S. city it's been detected in so far is Philadelphia, Pennsylvania.

One person has been arrested, but the name is not being released as the investigation is ongoing.