By Joseph White
(Reuters) - The president of the United Auto Workers union said on Thursday UAW organizers are in contact with workers at Silicon Valley electric car maker Tesla Inc <TSLA.O>, but said any formal effort to organize workers will "be determined by the interest of employees."
UAW President Dennis Williams said the UAW is not paying a worker who went public with concerns about working conditions at Tesla's Fremont, California factory, as Tesla Chief Executive Elon Musk charged last week.
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"It's uncharacteristic of Elon to attack his employees without knowing the facts," Williams told reporters in Detroit.
(Reporting By Joe White; Editing by Chizu Nomiyama)