WASHINGTON — The U.S. military has drawn up plans to significantly increase the number of American forces in Iraq, which now total around 1,400, as Washington seeks to bolster Iraqi forces battling the Islamic State, U.S. officials told Reuters on Friday.

The officials, speaking on condition of anonymity, declined to offer details. The United States aims to help advise and train Iraqi and Kurdish forces battling Islamic State fighters who swept into much of northern Iraq.