Update: All lanes are now open in what is being described by CHP as two separate accidents, one of them fatal.
A Sig-alert has been issued for a fatal, four-car crash on southbound Interstate Highway 880 in San Jose this morning, according to a California Highway Patrol officer.
An NBC Bay Area photographer has video of CHP officers interviewing two people in one of the cars involved in the accident. The coroner is also on the scene for an initial investigation.
The crash, which is blocking two lanes just north of The Alameda leaving only one lane open, was reported at 5:55 a.m. The traffic alert went into effect at 6:13 a.m., according to CHP Officer Marc Johnston.
At 7:30 a.m. traffic backed up more than 2 miles, to the highway 101 interchange. CHP has asked that three of the cars be detained as evidence.
Johnston said the two southbound lanes are expected to be blocked for an extended period of time as crews arrive. CHP indicates that lanes could reopen by or around 8:30 a.m.
-- Bay City News wire service contributed to this report.