Ukraine PM says Russia has made "declaration of war"

Ukraine live: Ukraine pleads for help to keep its nuclear assets safe

Ukraine is calling for Western help to protect its nuclear assets, and has called up all its military reservists "to preserve its territorial integrity" - after Putin won backing for armed intervention. All the latest news from Ukraine here

For full coverage of yesterday's events, see here

• Ukraine PM says Russia has made "declaration of war"
• Ukraine asks for help to protect its nuclear assets
• Country calls up its military reservists
• William Hague is on his way to Kiev
• Barack Obama spoke to Vladimir Putin for 90 mins on Saturday
• Ukraine crisis: 'World stands on brink of conflict,' warns Poland

• Ukraine in pictures: threat of war between Ukraine and Russia

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12.17 GERMAN FOREIGN MINISTER SAYS ESCALATION OF TENSIONS IN UKRAINE IS "EXTREMELY DANGEROUS"

12.13 Last night Russian warships were spotted off the coast of Crimea, in violation with Russia's agreement with Ukraine over the Sebastapol base.

Russia has controlled that base, remember, for 230 years.

They are allowed to keep their Black Sea fleet there but cannot just do as they wish - they agreed with Ukraine to keep Kiev informed.

Russian forces also took control of the Coast Guard offices in Balaklava - again violating the agreement.

See also:  

Ukraine PM warns of war as Russian military seizes control in Crimea