Russia cuts off gas supplies to Poland and Bulgaria

BBC Summary

Russian energy firm Gazprom says it has cut gas supplies to Poland and Bulgaria over their refusal to pay in roubles.

Ukraine says the action is the start of Russian "gas blackmail" aimed at its allies.

Poland says it can manage the situation, and can access gas from other sources.

Meanwhile, Germany has authorised the supply of about 50 anti-aircraft tanks to Ukraine, in a major policy shift.

Berlin's decision came as the US and its allies met at an airbase in Germany to pledge more weapons for Ukraine.

In other news, multiple explosions are heard in the Russian city of Belgorod, about 40km (24 miles) north of the Ukrainian border, according to a local official.