Iraqi Shiite forces and Syria accused the United States on Monday of targeting their troops inside Syria with an airstrike.
UNAMA released a report saying that a total of 36 people were killed in the April 2 attack.
Commanders are seeing new pockets of ISIS movement in a handful of areas in Syria, which has led to an uptick in airstrikes.
Putin's cautious response won't undermine his gains in Syria or erode his authority at home.
U.N. ambassador Nikki Haley said the president has made it clear that if Assad uses poison gas again, "the United States is...
Pence conferred late Friday with U.S. congressional leaders by telephone about the planned strike against Syria.
The United States has launched "precision strikes" on Syrian military targets days after a deadly chemical attack.
Defense Secretary Mattis said the assault was a "one-time shot," as long as Assad doesn't repeat his use of chemical weapons.
Russia and the Syrian military blamed Israel for a missile attack Monday on a Syrian air base that reportedly killed 14.
Syrian forces launched an offensive on an eastern Damascus suburb despite a U.N. resolution demanding a 30-day cease-fire.