7 p.m. update: WSDOT temporarily reopened southbound lanes to let traffic through. The closure was expected to last late into the night with a detour in place via 93rd Avenue in Tumwater and Route 121 in Maytown.
4:15 p.m. update: Two northbound lanes remain blocked. All southbound lanes are blocked, according to Washington State Department of Transportation.
Interstate 5 was blocked in both directions south of Tumwater on Monday afternoon following a crash involving at least four tractor-trailers, according to Washington State Patrol.
The crash happened about 1:10 p.m. at milepost 97 near 113th Avenue Southwest.
According to State Patrol, a northbound truck jackknifed into the center barrier and a second truck pushed it through the barrier. A southbound truck then hit the first one and a fourth truck went off the road trying to avoid the crash.
No serious injuries were reported and no other vehicles were involved, according to State Patrol.
Drivers were encouraged to avoid the area and delay trips if possible. Officials warned it would take time to remove the tractor-trailers and debris and repair the damaged barrier between north and southbound lanes.