NEW YORK (AP) — Boeing workers who build fighter jets are planning to go on strike Monday at midnight.

(Reuters) -Union members who assemble Boeing's fighter jets in the St. Louis area rejected the U.S. planemaker's latest contract offer on Sunday and will strike at midnight on Monday, the International Association of Machinists and Aerospace Workers union (IAM) said.

Boeing workers who build fighter jets are planning to go on strike on Monday at midnight. About 3,200 workers at Boeing facilities in St Louis and St Charles, Missouri and Mascoutah, Illinois voted to reject a modified four-year labour agreement with Boeing, the International Association of Machinists and Aerospace Workers union said on Sunday.