Published: Nov 20, 2012 11:45 AM EST

OAKLAND, Calif. (AP) - Striking custodial and maintenance workers in California have disrupted activity at the Port of Oakland.
    
Port spokesman Isaac Kos-Read says the workers were preventing trucks from entering the facility Tuesday morning. Longshoremen were also being kept from their jobs.
    
Kos-Read says six of the seven terminals at the port had waiting ships in what was expected to be a busy day in the midst of the holiday season.
    
Oakland International Airport workers were also part of the one-day strike and walked off the job Monday night. Kos-Read says air travel has not been affected.
    
The workers accuse port officials of failing to bargain for a new contract in good faith. Port officials say they're seeking only modest concessions, and the workers are well-compensated.

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