Russia is amassing bombers and cruise missiles for an "imminent large-scale attack ", analysts claim.
Satellite images provided by US-based company Maxar Technologies shows a massive build-up of Russian aircraft at the Engels-2 airport, which lies around 700km (435 miles) from the Ukrainian border inside Russia.
The aircraft include nearly two dozen long-range Tu-95 and Tu-160 bombers - two of Russia's flagship cruise-missile delivering aircraft.
