In one weekend there were 21 heroin overdoses in Lorain County. Three were fatal.

"Whatever substance is out there, it's putting these kids on the ground," says Lt. Roger Watkins with Lorain police.

Related: Lorain County Heroin Overdoses Spike

And for the most part, police say these victims are kids, some as young as 16 or 17 years old.

"I see a lot of high-schoolers and 20-year-olds using this. Heroin is their recreational drug of choice," says Watkins.

But as it turns out, what's on the streets and making the rounds right now is probably not heroin. And Watkins says there is no safe dose. The only reason there weren't more fatalities is because LPD is part of a pilot program that's armed its officers with a drug called Narcan, which can reverse the effects of a heroin overdose. Police saved three people with it this weekend.

Capt. Chris Costantino says Elyria police are about to start a similar program. And clearly, it's necessary, because whatever is being sold on the streets right now is deadly.

"Obviously these people are purchasing what they think is heroin, but obviously it's not," says Costantino.

Costantino says it may be a potent form of heroin combined with an opiate that's similar to morphine called "China White." The good news is 75 grams of it are off the street now because Elyria police arrested 29-year-old Siaerres "Sizzle" Noble on Sunday. Noble was carrying $10,000 worth of the deadly drug.

Noble is currently being held without bond. Meanwhile, police are investigating whether he is part of a larger drug ring.