UPDATE: Driver Involved in Fatal I-580 Collision Arrested on Suspicion of Drunken Driving

Update at 3:10 p.m.

The driver of the Hummer involved in the fatal collision on I-580 has been arrested, officials say.
Primitivo Garcia, 53, of Livermore was arrested on suspicion of felony DUI and vehicle manslaughter with gross negligence, according to CHP Officer Steve Creel.
Garcia has been booked in the Santa Rita Jail in Dublin.

Update at 2:35 p.m. by Bay City News—

The California Highway Patrol is looking into the possibility that alcohol was a factor in a fatal four-car crash on westbound Interstate Highway 580 near Livermore this morning, a CHP spokesman said.

The crash was reported at 10:04 a.m. just east of North Livermore Avenue. The incident initially blocked traffic on both sides of the highway and a Sig-alert was issued at 10:14 a.m., CHP Officer Steve Creel said.

As of 1:30 p.m., all eastbound lanes had been cleared but only two westbound lanes were open, according to Creel.

The crash appears to have occurred when a Hummer driven by a 53-year-old man struck a Jeep Cherokee from behind, Creel said.

Those two cars hit another two cars, and the Jeep burst into flames. The fire spread to the Hummer, but the driver and his passenger, a man in his 20s, were able to escape.

The pair was taken to Eden Medical Center in Castro Valley with what appeared to be minor injuries, Creel said.

Emergency crews were eventually able to approach the Jeep and determined there was at least one deceased person inside. Authorities have not yet released that person's identity.
  
Crews were searching for any other victims in the car, which was nearly destroyed in the crash, Creel said.

The CHP is investigating whether the driver of the Hummer was under the influence of alcohol, and Creel said he may be arrested.

Updated at 10:50 a.m.: 

The CHP website says lanes three and four for eastbound traffic have reopened, while all lanes of westbound remain closed. There is still no estimate when lanes one and two on the eastbound direction will reopen.

Original story:

A multi-car collision on I-580 in Livermore is causing major traffic delays in both directions, according to city officials. 

The California Highway Patrol has issued a SigAlert for the collision on westbound I-580 east of N. Livermore Avenue, which occurred just after 10 a.m. this morning. 

According to the CHP website, at least one of the cars is engulfed in flames. Fire and emergency crews are at the collision. There is no estimate for the reopening of the lanes at this time.

Patch will update this story as more information becomes available.