KIEV, Feb. 16 - JKX Oil & Gas Plc with assets in Ukraine and Russia and its wholly owned Ukrainian and Dutch subsidiaries have commenced arbitration proceedings against Ukraine under the Energy Charter Treaty, the bilateral investment treaty between the United Kingdom and Ukraine and the bilateral investment treaty between the Netherlands and Ukraine.

JKX is seeking repayment of more than $180 million in rental fees that its Ukrainian subsidiary has paid on production of oil and gas in Ukraine since 2011.