Washington ? House Speaker Nancy Pelosi said Wednesday the prospects of a vote on Armenian genocide were uncertain, after several members pulled their support amid fears it would cripple U.S. relations with Turkey.

The House proposal, which would label as genocide the killing of Armenians a century ago by Ottoman Turks, has inflamed U.S. tensions with Turkey, which says the death toll has been inflated and was the result of civil unrest, not genocide. Support for the nonbinding resolution deteriorated this week after Turkey recalled its U.S. ambassador to Ankara and several lawmakers spoke out against it.