The U.S. administration sought on Friday to contain fallout from a leaked internal memo critical of its Syria policy, but showed no sign it was willing to consider the military strikes that the letter, signed by dozens of American diplomats, called for.

Several U.S. officials said that while the White House is prepared to hear the diplomats' dissenting viewpoint, it is not expected to spur any changes in President Barack Obama's approach to Syria in his final seven months in office.

One senior official said that the test for whether these proposals for more aggressive action are given high-level consideration will be whether they "fall in line with our contention that there is no military solution to the conflict in Syria."