Air raid sirens are heard across Ukraine as explosions are reported in several major cities, including the capital, Kiev.
Riots erupt in the republic of Georgia for the second night in a row, as protesters accuse the government of clamping down on civil society with its new 'foreign agents' bill.
Police unleashed tear gas and water cannon on the crowds.
Our correspondent is there, reporting from the streets.
The head of the UN calls for the grain export deal between Russia and Ukraine to be prolonged, as Moscow insists that all sides must abide by the agreement.