Authorities have increased the number of injured people in an icy interstate pileup in eastern Oregon to 12.

State police say black ice is believed to be the cause of the crashes early Saturday morning involving more than a dozen tractor-trailers.

The 26-vehicle pileup left a long stretch of Interstate 84 closed for most of the day as crews worked to clean spilled diesel fuel and clear away dozens of vehicles that were either damaged or stranded.

Oregon State Police Sgt. Kyle Hove said late Saturday night that authorities had determined that a total of 12 people were injured. That is up from four reported earlier. The injuries ranged from minor to serious. There were no fatalities.

The crash occurred shortly before 5 a.m. east of Baker City, about 130 miles northwest of Boise, Idaho.

Authorities updated their report hours after the crash, increasing the number of vehicles directly involved from 20 to 26, and saying that the pileup left 50 to 70 vehicles stranded at the scene.

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