KIEV, Feb. 22 - Ukraine may sue Turkmenistan in an international court of arbitration in Stockholm if the Central Asian country breaks an earlier agreement on natural gas prices, an official said Wednesday.

???If somebody speaks to us a language that is non-legal, not based on agreements, we will be taking action, including in Stockholm,??? Oleksiy Ivchenko, the head of Naftogaz Ukrayiny, said.