UNITED NATIONS -- The United State is "prepared to act" if Russia doesn't get on board with a new call for a cease-fire in Syria, U.S. Ambassador to the U.N. Nikki Haley said Monday.
The U.S. has circulated a new resolution for the U.N. Security Council to consider as the 30-day nationwide humanitarian cease-fire called for on Feb. 24 has not been implemented, Haley said.
It is a simplified text "with no counterterrorism loopholes for Iran, Russia or (Syrian President Bashar) Assad to hide behind," Haley said.
It is not clear when a vote would take place.
If a 30-day nationwide humanitarian pause cannot be agreed upon, Haley said, the U.S. may be compelled to take its own action.
"The U.S. remains prepared to act if we must -- it is not the path we prefer but it is a path we have demonstrated we will take and we are prepared to take it again," Haley said.
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The U.S. launched dozens of missiles against a Syrian airbase last year in response to a chemical attack U.N. investigators have since said was carried out by the Syrian government.
Security Council diplomats have accused Russia of flouting the February agreement by replacing it with a five-hour daily humanitarian cease-fire.
The cease-fire resolution included a clause exempting efforts to fight terrorist groups from the humanitarian pause, which Russia has been accused of exploiting.
Russia's U.N. Ambassador Vassily Nebenzia said an immediate cease-fire "would have been utopian."