NATO has issued a warning over the build-up of Russian forces along the border with Ukraine.

Europe’s Supreme Allied Commander, General Phillip Breedlove, said NATO was worried about the threat to Moldova’s want away Trans-Dniester region.

Trans-Dniester is a strip of land close to Ukraine’s south-west border that declared independence from Moldova in 1990.

In Crimea, pro-Russian elements appear to be stepping up efforts to secure full military control of the region. It is reported that the Russian flag is now flying over 189 Ukrainian military establishments.

Earlier Pro-Russian forces moved on Feodosia, where they encircled a navy base.

In the Ukrainian capital Kyiv, thousands gathered for a unity rally. Addressing the protest Ukraine’s national security chief Andriy Parubiy claimed Russia was not going to stop at Crimea claiming Moscow’s plans included the whole of Ukraine.

In the eastern cities of Kharkiv and Donetsk, pro-Russian supporters called for a referendum on greater autonomy as the repercussions of the Crimea vote continue to destabilise Ukraine and infuriate the US and EU.