"I have no doubts that the United States planned for this strike, it is a provocation. They want to test Russia and to put Moscow in a difficult situation to test its response, to see if the Russians would go and help the Syrian army in this situation. It was clear to everyone that the Syrian army was fighting against IS in Deir ez-Zor, not rebels," Ahmad said.
Syria has been mired in civil war since 2011, with government forces fighting numerous opposition factions and extremist groups, including the Islamic State (IS), which is outlawed in many countries, including Russia. The government-held city of Deir Ez-Zor has been under siege from IS since July 2014.
The US-led coalition has been carrying out anti-IS strikes since September 2014 without Syrian government consent.