Multi-vehicle crash snarls traffic on northbound 405 Freeway in Sepulveda Pass

Traffic on the northbound 405 Freeway was snarled during the busy Monday morning commute due to a multi-vehicle crash that stretched across nearly half a mile across lanes.

The crash at about 6:40 a.m. on the northbound 405 Freeway at Sepulveda Boulevard involved as many as five vehicles, according to the California Highway Patrol. At least one vehicle, a white pickup truck, overturned, and the collision left one vehicle facing the wrong way.

The crash scene spread across a quarter-to-half-mile section of the northbound lanes, Los Angeles Fire Department spokeswoman Margaret Stewart said.

Four people suffered minor injuries. At least one person was taken to Northridge Hospital for treatment, according to the CHP.

A Sigalert was issued for three lanes of the freeway while crews worked to clear the scene. The Sigalert was canceled at about 10 a.m.

The cause of the crash was not known.