PORTLAND, Ore (KOIN) – Northbound lanes of Interstate 5 near Wilsonville were shut down for hours after a southbound semi truck crossed into the northbound lanes, according Oregon State Police.

Tualatin Valley Fire and Rescue are on the scene of the crash, which happened between the Wilsonville Road and Elligsen Road exits around 6:20 a.m. on Thursday morning. Four people were sent to the hospital, including two with serious injuries. Four total vehicles were involved, according to OSP.

Two northbound lanes opened at 11:40 a.m. Oregon Department of Transportation said they hope to reopen the right lane and right shoulder by the afternoon. Expect delays in the area throughout the afternoon.