KIEV, April 28 – The co-founder of Swiss-registered gas trader RosUkrEnergo (RUE), Dmytro Firtash, says he has not received any documents from the U.S. courts in connection with a lawsuit allegedly filed against him by former Ukrainian Prime Minister Yulia Tymoshenko concerning a dispute in a Stockholm court between RUE and Naftogaz Ukrainy.

"Fully supporting the ruling of the Stockholm arbitration, Mr. Firtash doubts that Ms. Tymoshenko has any grounds to challenge this decision in New York's courts or any other judicial bodies," the press service of the Ukrainian businessman reported on Thursday.