Pentagon official says Russian military's positions on ground have weakened

Ukraine's forces have brought the Russian advance to a halt in recent weeks and the Russian military's positions on the ground have weakened, a senior US defence official has said, Report informs, citing foreign media.

"You are seeing a complete and total lack of progress by the Russians on the battlefield," the official said, speaking to reporters on grounds of anonymity.

The spokesperson also commented on the latest events in Crimea – primarily, the explosions at the Novofedorivka airfield.

“I do not have an overall assessment of the total impact of the recent attacks, especially on the airfield in Crimea but, certainly, we are seeing this overarching picture of Russian forces being much more vulnerable than they thought they were, and we are seeing movements of Russian forces as a result to try to protect their capabilities,” the official said.