Boeing threatened on Friday to consider locations besides Washington State to assemble its new 777X jets after a union leader sharply criticized the terms of a tentative labor deal to keep the work in Washington.

The company said it would start pursuing other options if the International Association of Machinists and Aerospace Workers did not vote to ratify a proposed contract extension by Wednesday.

Boeing’s warning came in response to comments by the local president for the group, Tom Wroblewski, who tore up a copy of the proposed deal at the end of a union meeting Thursday night.

According to The Seattle Times, Mr. Wroblewski told union members that he would seek to have the proposal withdrawn. Workers had criticized parts of the eight-year contract extension during the meeting, including plans to limit pay raises to 1 percent every other year.