According to Oregon State Police, a car reportedly stopped in the right lane for an unknown reason causing other vehicles to slow and come to a stop.
The semi-truck was unable to react accordingly and rear-ended/crashed into all four other vehicles causing major damage to all vehicles and injuries to multiple passengers and drivers.
The semi driver was cited accordingly and placed out of service for 10 hours for not using an electronic logging device.
OSP says that several of the victims are significantly injured but to what extent is unknown at this time.
All lanes are open after a four-vehicle crash has shut down I-5 Saturday night. Multiple agencies responded to the scene of a crash on northbound I-5 on the viaduct in Medford.
The crash involved four vehicles including a commercial truck and is blocking the northbound, right-hand side lane. The highway was backed up for a couple hours. The crash is still under investigation.
This is a developing story stay with NBC5 News for details as we continue to learn more.
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