MOSCOW, Dec. 17 –An official of Russia’s Gazprom has expressed concern about the stated intention of Yulia Tymoshenko to renegotiate deals Ukraine has signed with the gas giant.

"Ukraine now can become the only possible place of possible tensions, should its new government try to change in one way or another the already signed agreements and contracts. At least, such statements were made on the Ukrainian part, and this certainly is worrying us," Gazprom spokesman Sergei Kupriyanov said on Vesti-24 television.