MOSCOW, June 2 – Gazprom CEO Alexei Miller - after meeting Naftogaz Ukrayiny chairman Oleh Dubyna in Moscow – said Tuesday he had no idea how the Ukrainian company will pay for natural gas imported in May.

Dubyna was visiting Gazprom headquarters for the second time over the past seven days apparently trying to arrange the payment of about $650 million by June 7 for gas imported in May.