The Anoka County Sheriff's Office says it's responded to six separate heroin overdoses over the course of 12 hours.
Commander Paul Sommer says that many cases between 5:30 a.m. and 5:30 p.m. is an "alarming anomaly."
Especially since the separate overdose cases all happened relatively close together.
"Although it is only speculation at this point, we are concerned about the possibility of a quantity of heroin that may be the single source of these overdose cases," Sommer explains. "Heroin is an illicit form of an opiate and its manufacture and distribution are always illegal and the purity and conditions of the substance are never known by its user."
So far, two of the overdoses have been fatal. Three people have been revived, and one is in critical condition.
Authorities say at least five of the people who overdosed are in their mid 20s. Four are males, and one is female. Not many details have been released regarding the most recent overdose.
The sheriff's office adds that two are from Fridley, one's from Anoka, and others are from Andover, Isanti and Ham Lake.
Heroin in Minnesota
Heroin is an opioid drug, and opioid use is on the rise in Minnesota and throughout the U.S.
In March, the White House announced it'd take steps to address the "epidemic."
According to the Centers for Disease Control and Prevention, heroin use among people ages 18-25 has more than doubled in the past decade. And fatal overdoes have nearly quadrupled from 2002-2013.
In the Twin Cities, a report found that heroin and methamphetamine were the biggest problem drugs last year.
And across the state, officials seized 47 percent more heroin than they did the year before. You can read the full report here.