WASHINGTON- U.S. President Barack Obama today signed a secret order authorizing a broader military mission in Afghanistan in 2015 than originally planned, the New York Times reported.

The decision ensures a direct role for American troops in fighting in Afghanistan for at least another year, it said, adding Obama's decision was made during a White House meeting with national security advisers in recent weeks.

In May, Obama said the American military would have no combat role in Afghanistan next year. Missions for the remaining 9,800 troops would be limited to training Afghan forces and to hunting the "remnants of al Qaeda", he said.

Obama's new order lets American forces execute missions against the Taliban and other militant groups threatening U.S. troops or the Afghan government.

The new authorization also allows U.S. air strikes to support Afghan forces on combat missions and U.S. troops occasionally to accompany Afghan troops on operations against the Taliban.

Obama's Afghanistan strategy faces stiffer criticism after the advance of Islamic State forces in Iraq and Syria.