Boeing is being hit with its second strike in less than a year after 3,200 hourly workers walked off their jobs building military aircraft.

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

Boeing workers who build fighter jets went on strike Monday at midnight Central Daylight Time. About 3,200 workers at Boeing facilities in St. Louis; St. Charles, Missouri; and Mascoutah, Illinois, voted to reject a modified four-year labor agreement with Boeing,