For the first time in more than a decade, BART operators and station agents will walk off the job Monday morning in a strike called this afternoon by the president of the Amalgamated Transit Union Local 155.

"BART has continually taken a retractable position in their demands," ATU President Jesse Hunt told reporters outside the union’s headquarters in Oakland.  "We believe what we’re looking for is fair and reasonable."

Hunt said he was keeping his commitment to riders to give a 72 hour notice. The strike will be effective at the "close of business" Sunday, after the last trains have completed their runs.

More coverage coming soon.