MONTREAL (AP) -- Bombardier Inc.'s unionized workers at a rail equipment plant in Quebec have launched a strike, a couple of days after beginning negotiations.

The union said Thursday that 330 members of the Confederation of National Trade Unions began the La Pocatiere plant's first strike in more than 30 years over concerns about sub-contracting, pension plans and wages.

Nearly 96 percent of union members gave the union a strike mandate last Saturday.

Union president Mario Levesque says it is prepared to return to the bargaining table.

The last contract expired Sept. 30, 2011.

The plant builds the interiors for 706 Chicago transit cars, 100 multi-level New Jersey transit cars and 54 multi-level cars for Maryland transit.

La Pocatiere's workforce stands at about 585, including 370 unionized workers.