BENGALURU – Boeing said on Oct 8 that it had withdrawn its pay offer to around 33,000 US factory workers and no further negotiations were planned with their union representatives as a financially damaging strike nears its fourth week.

Boeing and the union held their latest round of negotiations with federal mediators on Oct 7 and 8. But talks collapsed and the sides were left locked in an acrimonious stalemate showing no signs of being resolved anytime soon, a person briefed on the talks said.