Vladimir Putin
Media playback is unsupported on your device
Video

Will fresh sanctions against Russia prove effective?

UK Prime Minister David Cameron says Europe must now consider "hard hitting economic sanctions" against Russia.

Moscow cannot expect access to European markets, capital or technical expertise while it is fuelling a conflict in Ukraine, he said.

European finance ministers meet in Brussels on Tuesday to agree their next move.

BBC business correspondent Simon Jack considers how effective tougher penalties might be.