About 3,200 union members at Boeing facilities in Missouri and Illinois went on strike at midnight on Monday after rejecting an offer from the company, the union said.

The union representing Boeing employees have begun a strike after about 3,200 workers at facilities in St. Louis and other locations voted to reject a modified four-year labor agreement.

Boeing union workers who assemble fighter jets strike in two states following rejection of contract offering 20% general wage increase and $5,000 bonus.