UPDATE as of 5 p.m. All lanes are cleared, according to WSDOT.
INITIAL POST: A crash on southbound Interstate 5 at 54th Street East in Fife is causing a backup, according to the state Department of Transportation.
The HOV lane is blocked, and emergency responders are on the scene, WSDOT officials said at 3:30 p.m.
The crash happened at 3:15 p.m.