Authorities say they're still looking into the sources of heroin that caused two deaths and several other overdoses last weekend across the metro.
Two clusters of overdoses were particularly unsettling, authorities said — five cases were reported within 30 minutes of one another in the south metro Friday evening and six cases surfaced Saturday in Anoka County, where the deaths occurred.
The Anoka County Sheriff's Office said the heroin in their cases likely came from one source, but it's unknown whether the drug was cut with another narcotic or why it was so deadly.
"We have no idea where [the drugs] came from," said Anoka County sheriff's Cmdr. Paul Sommer. "I don't know if it's tainted. I don't know if it's super potent. We just don't know."
Sommer said there was no heroin left at the six different scenes to test, but that the timing and geographic proximity of the cases led authorities to believe the drugs had the same origin. Police are unaware of any relationship among the people who overdosed in Anoka County; they were not together at the time.
"It's alarming and it's an aberration and it's outside the norm," Sommer said.
The overdoses occurred between 5:31 a.m. and 2:48 p.m. involving five men and one woman ranging in age from 20 to 30.
The Sheriff's Office and the Midwest Medical Examiner's Office declined to identify the 22-year-old Fridley man found dead in Fridley and the 23-year-old Ramsey man found dead in Anoka.