New satellite imagery appears to reveal extensive damage to a strategically significant airbase in central Syria used by Russian forces after an attack by so-called Islamic State (IS).
Four helicopters and 20 lorries were destroyed in a series of fires inside the T4 base last week, the images from intelligence company Stratfor suggest.
The cause of the fires is unconfirmed.
A pro-Kremlin website said the helicopters had been used by “used by both Russian and Syrian air forces”.
Russia has not officially commented on the incident.
A Russian opposition website quoted Syrian sources as saying “a large fire in the Syrian part of the T4 airbase spread to the fleet of vehicles, and after a fuel tank exploded four Russian helicopters nearby went up in flames”.
“The cause of the fire is being established,” it added.
