The head of Russia's top natural gas producer, Gazprom, said on Thursday it would further increase the gas price for Ukraine to $485 per 1,000 cubic metres from April, after introducing an export duty, Reuters reported. Gazprom Chief Executive Alexei Miller said the price would increase during a meeting with Prime Minister Dmitry Medvedev, who urged Ukraine to pay off its gas debts. The increase came just two days after Gazprom announced a 44 percent hike in the gas price for Ukraine starting from April 1 to $385.5 per 1,000 cubic metres due to the unpaid bills.