The European Commission said they have the tools to deal with "unfair economic coercion against a single member state".

Bulgaria is part of a group of countries that have committed themselves to the transit and servicing of Russian gas.

Another opponent is Volodymyr Omelchenko, of Kyiv-based think-tank Razumkov Center, who is sceptical of buying what he describes as "the cheapest Russian junk." He believes that Bulgaria was ...