KIEV, April 11 - Ukraine is preparing to take Russia to an international arbitration court in Stockholm over a natural gas deal signed between Naftogaz and Gazprom in January 2009, Energy and Coal Industry Minister Yuriy Prodan said Friday.

“When does the government plan to sue Gazprom to eliminate the deal with Naftogaz Ukrayiny?” Prodan said addressing lawmakers in Parliament. “This work is being done since tday one of my appointment to office."

“We come through preparation of relevant documents and review those disadvantageous conditions that now exist in the contract,” he said.