The United States military has called on Russia not to take any unilateral action in Syria in response to cease-fire violations.
Colonel Steve Warren, a spokesman for the U.S.-led coalition fighting against the Islamic State (IS) group and other Islamic extremist forces in Syria and Iraq, said on March 21 that "we fully expect Russia to refrain from unilateral actions and respond to our counterproposal" on dealing with violations of the truce in Syria.
Russia's military had called earlier on March 21 foran urgent meeting with U.S. representatives to agree on the mechanism of enforcing the cease-fire.
"Further delays with implementing of the agreed rules of reaction to violations of the cease-fire regime in Syria is unacceptable," the Russian General Staff said in a statement.
The statement said Russia would act unilaterally starting from March 22 if it gets no response from Washington.
The cease-fire in Syria began on February 27, helping to significantly reduce hostilities. The IS and the Al-Qaeda-linked Al-Nusra Front are excluded from the truce.