Russia and Ukraine sank further into a widening trade war yesterday, as Russia halted all gas deliveries to Ukraine and Ukraine banned Russian airlines from using its airspace.
Tensions have heightened over the disputed peninsula of Crimea, which Russia annexed in March last year, but which still depends on Ukraine for much of its key infrastructure.
Following a blackout in Crimea prompted by an explosion that downed several electricity pylons on Ukrainian territory, the two countries have traded punitive measures with little restraint.
Russian President Vladimir Putin told journalists yesterday that Ukraine's Government had tacitly supported the Crimea blackout, which he said was "torturing people".
Alexei Miller, chief executive of the Russian energy giant Gazprom, yesterday said gas supplies would be cut off to Ukraine as of today until Russia received prepayment for further deliveries.