As it happened: Ukraine crisis
Key Points
- Russia's President Vladimir Putin says there is no need to send Russian troops to Ukraine, but the use of force remains "a last resort"
- Mr Putin says Russia reserves the right to intervene if there is "lawlessness" in Russian-speaking areas of eastern Ukraine
- US Secretary of State John Kerry has condemned what he describes as "Russia's act of aggression in Ukraine"
- US President Barack Obama said Mr Putin was "not fooling anyone" and that Russia had no right to intervene in Crimea
- Ukraine's interim government says 16,000 Russian troops are now deployed across Crimea
- Moscow has agreed to attend an extraordinary meeting of Nato members on Wednesday. All times GMT