Update 4:55 p.m.: The Sacramento Bee reports that police detained the shooter after 3 p.m.
Update 12:23 p.m.: West Sacramento police tell KQED's Mina Kim that the Yolo Causeway has reopened. CHP confirms...
CHP confirms to KCBS:Yolo Causeway being re-opened.Traffic still very heavy in the area.bit.ly/kcbslive
— KCBS 740 AM/106.9 FM (@KCBSNews) April 20, 2012
The ongoing hunt for a carjacker, who has reportedly shot at police, has shut down I-80 between Davis and West Sacramento, causing a massive traffic jam. Adding to the misery of trapped motorists, many on their way to Tahoe for the weekend: It's really hot.
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Later, the gunman carjacked a pickup truck, hitting the owner on the back of the head. The Sacramento Bee reports that vehicle has now been found.
Update 12:03 p.m.
Here's a map of the area: