Boeing workers at its St. Louis area defense factories will stay on strike after union members voted Friday to reject a new contract offer from the US aviation giant.

The strike began August 4, involving some 3,200 workers in Missouri and Illinois represented by the International Association of Machinists and Aerospace Workers (IAM) District 837.

This marks the third time that workers have rejected a company offer, and Boeing said in a statement that no further talks were scheduled for now.

"Boeing's modified offer did not include a sufficient signing bonus relative to what other Boeing workers have received," the union said Friday in a statement, in which it also cited the lack of improvement in other benefits.

IAM is among the biggest unions in North America, representing some 600,00

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