Boeing workers at three Midwest plants voted Sunday to reject a new contract and continue their nearly three-month strike over wages and benefits.

The vote was close, with Boeing claiming workers want to cross picket lines, while the union insisted solidarity remains strong.

The strike affects Boeing’s Defense division, which generates more than a third of the company’s revenue.

Boeing workers at three Midwestern plants where military aircraft and weapons are developed voted Sunday to reject the company’s latest contract offer and to continue a strike that started almost three months ago.

The strike by about 3,200 machinists at the plants in Mascoutah, Ill., St. Louis and St. Charles, Mo., is smaller in scale than a walkout last year by 33,000 Boeing workers who assemble commercial jet

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