Russia's Gazprom to warn Ukraine's Naftogaz about new regulations

Russia's gas-producing giant Gazprom is going to warn Ukraine's Naftogaz company about new regulations, according to which Russia will deliver only the amount of gas that has already been paid for in advance, Gazprom's chief executive Alexey Miller says.

Gazprom is going to send an official letter to Naftogaz on June 2. On June 3 the new provisions are expected to come into force.