A fatal accident occurred at Fourth and King, resulting in the death of a pedestrian. The incident, where an eastbound big-rig collided with a southbound pickup truck, happened at around 5 a.m.

According to BCN (via SF Appeal): "During the collision, the pickup was hit toward the rear by the big-rig, causing it to spin out of control. The pickup then struck the pedestrian ... The pedestrian was transported to a hospital and pronounced dead."

The man driving the pickup truck was detained by authorities.

King Street was closed for a few hours, but has since reopened. Muni delays still persist.

Update: The driver of he truck, 36-year-old Dwain Davis of Templeton, was arrested on suspicion of driving under the influence and manslaughter.