US will support Russian action in Syria

The U.S. military will have to shift surveillance aircraft from other regions and increase the number of intelligence analysts to coordinate attacks with Russia under the Syria cease-fire deal partly in order to target militants the U.S. has largely spared, senior officials say.

Senior defense and military officials told media that they are sorting out how the U.S.-Russia military partnership will take shape and how that will change where U.S. equipment and people will be deployed. They said, however, that they will need to take assets from other parts of the world, because U.S. military leaders don't want to erode the current U.S.-led coalition campaign against the Islamic State group in Iraq and Syria.

The Syria cease-fire deal struck by U.S. Secretary of State John Kerry and Russian Foreign Minister Sergey Lavrov is designed to pause the civil war so that the superpowers' militaries can be jointly concentrated against the Islamic extremist groups operating within the chaos on the ground.

The concerns reflect the U.S. military's broader skepticism about partnering with Russia, which it says it distrusts.

Russia also sceptical about U.S. because of unclear intentions and hidden agenda of Washington.