"Naftogaz has paid in full for April gas supplies," a Gazprom spokesman said.
In line with agreements reached earlier in Moscow, Ukraine must pay for each month's gas supplies by the 7th day of the following month. If payment is not made on time, then Gazprom can insist on a switch to advance payments deliveries.
Naftogaz made timely payments for gas delivered to the ex-Soviet republic in January, February and March.
Gazprom suspended gas deliveries to Ukraine on January 1 over non-payment, and the sides' failure to reach a new gas deal. A week later, Gazprom accused Ukraine of stealing gas intended for EU consumers and cut off supplies to the European Union via the country, prompting two weeks of gas shortfalls across much of Eastern Europe.
The standoff was resolved after negotiations between Russian Prime Minister Vladimir Putin and his Ukrainian counterpart Yulia Tymoshenko resulted in the signing of a new gas agreement on January 19.
