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.

Rosneft accused the EU of ignoring international law and interfering with the sovereignty of third countries like India. The Russian oil giant called the sanctions part of a broader attempt to destabilise global energy markets and create unfair competition.

Newly imposed European sanctions against India’s Nayara Energy refinery are “unjustified and illegal,” according to Russian oil major Rosneft PJSC that co-owns the facility.