(Ekevara Kitpowsong/Special to the S.F. Examiner)

UPDATE: BART back with ‘limited’ service, no trains to SFO, Milbrae

UPDATE 11:55 a.m.: BART is back — somewhat.

BART has resumed “limited” service, the agency said Saturday morning at 9:03 a.m., roughly three hours after announcing a service-wide disruption.

Trains are running across the Bay but no stations south of Daly City are in service.

That means riders heading to South San Francisco, Colma, San Bruno, Milbrae and the San Francisco International Airport will need to find alternate travel options.

“BART’s breakdown this morning is unacceptable,” said Janice Li, a member of the BART Board of Directors, on Twitter. “I’m working on getting answers but first and foremost, I’m sorry.”

BART also corrected its earlier statements claiming the computer error stemmed from electrical work.

The true cause of the computer problem is still unknown, BART spokespeople said, and the agency is investigating.

The original story follows:

Zero. None. Nada.

There are no BART trains running Saturday morning across the entire Bay Area-wide transportation system.

If you must cross the bay Saturday, officials are advising bus routes, ferries or hitching a ride from a friend.

The problem is computer related, BART officials said, in a statement.

BART crews working overnight on a power supply in Oakland “ran into problems” that affected the agency’s computer system and traction power supply system.

That’s the system that powers trains, according to BART, and now crews are working to repair it.

Without both these systems, we are not able to safely dispatch trains for service,” BART officials wrote in a statement.

Some bus agencies that serve BART stations are offering free rides to BART riders as “mutual aid” to the agency.

BART recommends using its trip planner to find alternate transit.

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