US intelligence agencies that train and equip "moderate" rebels in secret cantonments in the Middle East expressed displeasure with Washington's inaction after Russian Air Forces started an anti-terrorist operation in Syria, the paper wrote, citing high-ranking US officials.
"It was clear that something pretty big was up," the official said.
Before Moscow began its military operation, some Obama administration officials called for a wait-and-see approach to "determine whether Russia would actually attack the Islamic State." And now White House is debating on how to react to the current situation, the paper says.
"The struggle to find a way to respond has become a source of tension within the administration," the Post wrote. "CIA Director John Brennan has voiced frustration with US inaction as fighters trained and armed by the agency at secret camps in Jordan over the past two years face a Russian assault".
Presently, US intelligence agencies are interested in the scale and duration of the Russian campaign, also its influence on CIA's training and equipment of "moderate rebel groups caught between Assad's army and extremist elements including the Islamic State", the Post concludes.