Cutting supplies could disrupt the gas flow to the European Union.
“The talks in Kiev … finished around 2:30 a.m. Moscow time (2230 GMT on Sunday). The Russian side is expecting payment of the accumulated gas debt of $1.951 billion before 10 a.m. (0600 GMT) on June 16,” Kupriyanov said.
“If the funds are not paid, gas supplies will, as was announced earlier, be switched to a pre-payment system.”
Russia and Ukraine disagree how much Kiev should pay for the natural gas it