CHICAGO (CBS) — Three overdoses left two people dead in less than 24 hours in Portage, Indiana.

Police believe the overdoses were all heroin-related. Residue from one scene tested positive for fentanyl, which is commonly mixed with heroin, but is 50 times stronger.

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“We believe there is a lethal batch of heroin out there laced with fentanyl. This is not a Portage problem, but a regional issue that we all have been fighting for some time,” Portage police said in a Facebook post. “We know that addiction is a struggle to say the least and many families have experienced the pain it causes. We value lives and do not want to see anyone die from this.”

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Last month, at least 20 people overdosed on heroin on Chicago’s West Side. Three of those people died.

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If you or anyone you know is struggling with addiction, you can call the Illinois Helpline at 833-2FINDHELP, or the Indiana Addiction hotline at 800-662-HELP