A collision on Interstate 5 just north of Everett has caused a 6-mile backup for drivers traveling south, the Washington State Department of Transportation said Monday morning.

The department first posted about the closure on X shortly before 7 a.m. WSDOT’s real-time traffic map showed the backup stretching through Marysville around 8 a.m.

Drivers should avoid the area if possible or prepare for delays, the department said.