EU wrestles with Russia oil embargo as leaders gather for summit

The EU has already slapped five rounds of sanctions on Russia over its actions in Ukraine

An oil rig in Russia (Dmitry Lovetsky/AP)

European Union leaders are gathering in a new show of solidarity with Ukraine.

However, divisions over whether to target Russian oil in a new series of sanctions are exposing the limits of how far the bloc can go to help the war-torn country.