A driver who caused a five-vehicle accident on Interstate 5 in Federal Way Thursday morning faces vehicular assault charges.

Around 9 a.m. Oct. 31, South King Fire and Rescue responded to the accident on 1-5 North just outside of the 320th Street exit in Federal Way.

Trooper Rick Johnson with Washington State Patrol said the accident was caused by one vehicle traveling at a high rate of speed on the left shoulder of I-5 North.

Johnson said the suspect vehicle sustained front end damage, but did not cause injuries to the two inside as they both fled on foot after the crash.

Johnson confirmed both suspects were apprehended but police are still trying to determine details of witness reports.

According to SKFR Lt. Brad Chaney, only two people involved in the crash needed medical attention.

Both patients were from the same vehicle, which sustained severe damage both to the front and rear ends.

Chaney said the driver of the vehicle was treated on scene for minor injuries, and was transported to Harborview.

The second patient, who was found unconscious and trapped in the vehicle, was extracted with the jaws of life, Chaney said.

The patient was then back-boarded and given a c-collar before being treated and sent to Harborview with serious injuries, he said.

Johnson said the suspect driver who caused the crash faces a vehicular assault charge because of these injuries.

According to Johnson’s Twitter account, two lanes on northbound I-5 were closed during the investigation.