PARIS (AP) _ A strike by a printers union Thursday prevented publication of all but one of France's nationally circulated daily newspapers.

The union, a branch of the leftist General Confederation of Labor, called the 24-hour strike as a warning to publishers ahead of negotiations that could lead to printers' layoffs.

Of the eight general-interest dailies published in the capital, only the Quotidien de Paris managed to publish by using an out-of-town printing plant. It printed only half of its normal run of 100,000 copies.

The strike also halted publication of nationally circulated sports and financial dailies.

Roland Binger, secretary-general of the printers' union, said the union had accepted publishers's proposal for early retirement of about 2,200 printers. But he said the union opposed tentative plans to lay off 750 younger printers.