Multiple people were injured in a 20-vehicle crash Saturday night on Interstate 84 that closed the westbound lanes for more than 12 hours.

According to Oregon State Police, troopers reported to the first crash about 6:20 p.m. near milepost 223 westbound, about 8 miles east of the Wildhorse exit. About 20 vehicles were involved in that collision, including seven commercial trucks and 13 passenger vehicles.

Many were injured. Some were transported by air and ground ambulance to St. Anthony’s Hospital in Pendleton and Kadlec Regional Medical Center in Richland.

According to a news release from OSP, a preliminary investigation revealed speed and black ice were contributing factors, creating a domino effect resulting in the multiple vehicle collisions.

OSP was assisted by Pendleton Fire, Umatilla County Fire District 1, Life Flight, Medic 400-Athena, Umatilla County Sheriff’s Office, Umatilla County Search and Rescue, Umatilla County Emergency Management, Umatilla Tribal Fire Department, Umatilla Tribal Police Department, and Oregon Department of Transportation.

ODOT closed Interstate 84 westbound lanes until it was reopened at 8 a.m. Sunday morning. According to OSP, this remains an ongoing and extensive investigation. More information will be released when available.

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