KIEV, April 11 – Ukraine’s national oil and gas company, Naftogaz Ukrayiny, signed a contract with RosUkrEnergo to supply about 50 billion cubic meters of natural gas to Ukraine, a top official at President Viktor Yushchenko’s office said Friday.

“The contract is finally signed,” Oleksandr Shlapak, Yushchenko’s deputy chief of staff, said at a press conference.