Breaking News: Pedestrian Killed at 4th and King This Morning

This morning just after 5 am a pedestrian was killed when a tractor-trailer hit another truck, sending that vehicle careening into the victim. Details are still scant, but major media outlets report the fatal incident has backed up traffic on Northbound I-280 and delayed Muni lines that pass through the intersection. ABC7 Traffic Anchor Frances Dinglasan has tweeted a few details, though:

• "Confirmed FATALaccident on King St. at 4th. N280 offramp to king st closed until 9AM. King onramp to sb280 open." - 7:20 am
• "In SF: apedestrian got pinned under a pickup truck when it spun out of controlafter being hit by a garbage truck at King st. & 4th st." - 7:12 am
• "SF: NB 280 King St off ramp CLOSED until 9AM for major inj acc. NB King Closed from 280to ATT park. But, SB King open to SB280" - 7:11 am

KCBS radio anchor Stan Bunger has tweeted that Muni N-Judah service has been restored through 3rd and King. 

Thanks to Streetsblog reader Mike Sonn for the early tip. If anyone has more details, please post in the comments. We'll provide updates if we get them.

UPDATE 9:15 am: Several outlets are now reporting that the pedestrian who was struck and killed was standing on or near the Muni platform at 4th and King. The driver of the pick-up truck that was hit by the tractor-trailer and spun into the victim is being detained for further questioning.