Observer staff

Twenty vehicles were involved in a collision on Interstate 84 westbound near milepost 223 on Saturday night.
According to a press release from Oregon State Police, preliminary investigation shows speed and black ice was a contributing factor to the accident, which created a domino effect resulting in the multiple vehicle collision. There were seven commercial motor vehicles and 13 passenger vehicles involved, according to the release.
Life Flight and Umatilla County first responders transported those who were injured to St. Anthony’s Hospital in Pendleton and Kadlec Regional Medical Center in Richland.
The press release does not state how many people were injured or how serious the injuries were.
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, Oregon Department of Transportation (ODOT).
The interstate was closed all Saturday night and was reopened at 8 a.m. this morning.
This is an ongoing and extensive investigation, according to the release.