"Everyone realizes how important Bombardier is to Northern Ireland and we will use our influence with our government to make sure that continues," the DUP's Arlene Foster told Sky News.

The U.S. government has slapped heavy tariffs on Bombardier Inc's (>> Bombardier, Inc.) CSeries jets which are partly made in Northern Ireland, potentially risking 4,200 jobs in the British province.

Boeing accuses Bombardier of dumping its new CSeries passenger jet in the U.S. market and says the aircraft is being unfairly subsidized by Canada, a charge the Canadian firm denies.

"What we must do now is to continue to work with our own government, with the American government, with the Canadian government, in trying to get Boeing to see sense," Foster said.

(Reporting by Michael Holden; editing by Stephen Addison)

Stocks treated in this article : Boeing Company (The), Bombardier, Inc.