12/21 11:36 AM: Two brothers who were injured when a speeding driver struck their car in San Francisco early Saturday morning remain hospitalized in critical condition today.

The brothers’ car was hit at about 4:30 a.m. Saturday as they drove north on Junipero Serra Boulevard near 19th Avenue, police said.

According to the brothers’ family, Ruedi and Matthias Keller were returning home from the airport when their Geo Prizm was rear-ended by a driver traveling at a speed estimated at about 100 mph.

That driver, 21-year-old James Hunt, of Fremont, died at the scene.

Police spokeswoman Lt. Lyn Tomioka said today that an investigation into the crash is ongoing, but that it does appear Hunt was driving too fast.

“The initial investigation indicates that the driver of the other vehicle was speeding,” she said. There was no immediate indication that drugs or alcohol played a role, she added.

The brothers’ family has been posting updates on the Web site, They say the boys’ conditions remain serious, but have stabilized.

Photo: Ruedi & Matthias Keller, from their site

12/20 12:20 PM: A 21-year-old man has been identified as the driver killed in a two-vehicle crash in San Francisco early Saturday morning, according to the medical examiner’s office.

James Hunt of Fremont was alone in his car when it collided head-on with another vehicle at Junipero Serra Boulevard and 19th Avenue at about 4:25 a.m., police said.

Hunt was pronounced dead at the scene.

Two people in the other car were seriously injured and transported to an area hospital, according to police.

An autopsy is scheduled for Hunt on Monday, the medical examiner’s office reported.

12/19 9:53 AM: All but one lane of northbound state Highway 1 reopened this morning about four hours after a two-vehicle fatal crash in San Francisco, according to the California Highway Patrol.

Units responded to reports of a head-on collision at Junipero Serra Boulevard and 19th Avenue at around 4:25 a.m., CHP Officer Scott Cakebread said.

One man, who was driving alone, was killed in the crash and two other people who were in another vehicle were transported to an area hospital with life-threatening injuries, San Francisco police Officer Samson Chan said.

A Sig-alert was issued at 5:24 a.m. All but the far left lane reopened by about 9:15 a.m.

12/19 5:45 AM: All lanes of northbound state Highway 1 are blocked by a serious injury crash in San Francisco this morning, a California Highway Patrol officer said.

Units responded to reports of a head-on collision at Junipero Serra Boulevard and 19th Avenue at around 4:30 a.m., Officer Scott Cakebread said.

Serious injuries have been reported.

All northbound lanes are currently blocked and traffic is being diverted off of Highway 1 at Brotherhood. Three lanes of southbound traffic are also blocked.

A Sig-alert was issued at 5:24 a.m.

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