Southbound Interstate 5 is back open after an accident early Friday morning closed all four lanes of traffic.
A pedestrian was killed after a collision with a semi truck I-5 south in Mountlake Terrace. The accident happened around 7:30 a.m. near 220th Street Southwest on Friday.
Washington State Patrol Trooper Judson said the accident appears to be a suicide.
One hour later, traffic was backed up to Interstate 405 in Lynnwood.
WSP was on scene and investigating the incident.