Fentanyl fuels string of deadly weekend overdoses in Portland, Oregon

FILE - A vial containing 2mg of fentanyl, which will kill a human if ingested into the body, is displayed at the Drug Enforcement Administration (DEA) Special Testing and Research Laboratory in Sterling, Va., on Aug. 9, 2016. Police in Portland, Ore., say that at least eight people died from suspected drug overdoses over the weekend. The police bureau said that six of the deaths were likely fentanyl related. (AP Photo/Cliff Owen, File)

PORTLAND, Ore. (AP) — A series of suspected drug overdoses left at least eight people dead over the weekend in Portland, Oregon, according to the city's police bureau.

Six of the deaths were likely related to fentanyl, a potent synthetic opioid. Several of those who died believed they were using cocaine, when it was actually fentanyl or a mix of the two substances, the city's police bureau said in a news release.

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