Russia has deployed 50 warplanes for exercises over the Black Sea as the US warned airlines that civilian flights could be shot down.
The Vladimir Putin-led country continues to flex its military muscles, with new footage suggesting it is building up an armed frontier near the border with the Ukrainian border.
On Saturday it was conducting aerial manoeuvres, including missile launches and bombings, according to independent Russian news agency Interfax.
It added that aircraft involved were Su-27SM and Su-30SM fighters, Su-24M and Su-34 bombers and Su-25SM3 attack planes. Naval aircraft and helicopters and the Black Sea Fleet are also involved.
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