A 42-year-old Federal Way woman was killed and two Kent residents injured in a two-vehicle collision on Saturday night along southbound Interstate 5 in SeaTac near the South 188th Street exit.

A 40-year-old Kent woman, driving a 2001 Chevrolet Tahoe, slowed for traffic in lane one at about 11:28 p.m., lost control and drove into lane two, according to a State Patrol accident report. The Tahoe struck a Freightliner tractor truck towing a trailer, which caused the truck to roll over. Both vehicles came to rest on the left shoulder and left lane.

The Federal Way woman was a passenger in the Tahoe. She was not wearing a seat belt and died at the scene. The King County Medical Examiner’s Office identified her on Monday as Irma Tranquilino Pena.

Paramedics transported the Kent woman to Harborview Medical Center in Seattle. A Kent man, 42, a passenger in the Tahoe, also was transported to Harborview. Both were wearing seat belts.

The truck driver, a 27-year-old Everett man, and his 62-year-old female passenger from Mount Vernon, were each taken to Highline Medical Center in Burien. Both were wearing seat belts.

The cause of the accident remains under investigation. Drugs or alcohol were not involved, according to the State Patrol. The freeway was blocked for nearly 12 hours because of the accident.