(AP) -- Union employees have continued showing up for work at AT&T after a midnight deadline passed for a new contract agreement.
But the Communications Workers of America says on its Web site, "that can change at any time."
The union says employment security and health care are still holding up the talks on new contracts to replace those that expired at 11:59 p.m. Saturday.
It also reports several of its districts have filed charges with the National Labor Relations Board, accusing AT&T of refusing to provide information necessary to resolve outstanding issues.
AT&T says such charges are "very common" during negotiations.
The union is resisting AT&T's push to have workers and retirees pay more for their health care, which the company says costs $5.5 billion per year.
The company says other remaining stumbling blocks include wages, pensions, and work rules.
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