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File: Bay Area Rapid Transit (BART) passengers walk off of a train on Oct. 15, 2013 in San Francisco.
Police from the San Francisco Bay Area's rapid transit system say two employees performing maintenance have been struck and killed by a train.
Saturday afternoon's accident on a track in Walnut Creek comes amid a strike by Bay Area Rapid Transit workers that has shut the system down. But some trains were being moved by managers.
It was unclear how the 1:45 p.m. accident occurred. BART Deputy Police Chief Ben Fairow confirmed the deaths to the Contra Costa Times. The newspaper said there are two tarps on the tracks about 150 yards apart.
BART officials said in a statement that they would release more information later Saturday.
BART management and union officials have been at an impasse over contract negotiations since Thursday.