At least 42 dead in street battle between pro and anti-Russian groups in port town of Odessa

US prepares further sanctions on Moscow as separatists seize bus believing Kiev spy on board

Call follows Obama criticism of Russia in a telephone conversation with Vladimir Putin

Call for UN to send peacekeepers to eastern Ukraine as pro-Russian troops maintain occupation

G7 leaders meet on sidelines of nuclear security summit in The Hague

Just one deputy in State Duma opposes annexation with ratification of move likely tomorrow

Member states divided over possible scale and scope of further sanctions

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Kiev issues order permitting its soldiers in Crimea to use weapons to protect their lives

Putin sends 6,000 extra troops into region, Ukraine’s military on high alert

Acting interior minister says former president suspected of involvement in ‘mass murder’