Rosneft, Russia's biggest oil producer, on Sunday slammed European Union sanctions on India's Nayara Energy refinery as unjustified and illegal, saying the restrictions directly threatened India's energy security.

The European Union and Britain are ramping up pressure on Russia over its war on Ukraine. The EU has introduced new sanctions to deprive Moscow of energy revenue through a lower oil price cap and a ban on transactions with Nord Stream gas pipelines.

The European Union approved a new series of sanctions against Russia on Friday in response to its ongoing war in Ukraine. The measures include a lower oil price cap, a ban on transactions involving the Nord Stream gas pipelines,