Chrysler Corp. workers represented by the United Auto Workers returned to work early Tuesday without a contract as the No. 3 carmaker and union bargained throughout the night in hopes of reaching a three-year labor pact.

The union urged Chrysler's 67,000 U.S. hourly workers to report to their jobs despite no new tentative agreement and the expiration of the pact that had been in effect until midnight Monday."We are back here working," said Connie Kerr, of Local 372 at Chrysler's Trenton, Mich., engine plant.

There were no reports of wildcat walkouts at any of Chrysler's 20 U.S. plants or facilities affected by the negotiations.

UAW spokesman Bob Barbee characterized the pace of the talks at Chrysler's Highland Park headquarters as slow while bargainers resumed talks following a breakfast break.