More than 1,000 workers sign up to unionize at top US Volkswagen plant

UAW says effort at Chattanooga plant in Tennessee is booming as union aims expand membership after recent victories

More than 1,000 workers at Volkswagen's Chattanooga plant in Tennessee - the automaker's flagship US manufacturing site - have signaled they want to unionize, a significant early win in the United Auto Workers' latest attempt to expand its membership.

The UAW announced on Thursday that over 30% of the plant's workforce had signed on in the first week. Once a majority signs union authorization cards, the UAW can file for a union election with the National Labor Relations Board.