(Reuters) — The first liquefied natural gas tankers from the United States to Poland and the Netherlands are both expected to arrive on June 7, according to Reuters shipping data.

Arctic Discoverer, capable of carrying about 2.9 bcf of natural gas, is headed for the Netherlands, while the Clean Ocean, with a capacity of around 3.2 bcf, is headed for the Poland.

The vessels left Cheniere Energy Inc.'s Sabine Pass LNG export terminal in Louisiana on May 21 and May 22.

In May, Poland's minister responsible for oil and gas infrastructure said LNG imports from the United States could significantly undermine the dominant position on the European gas market of Russia's Gazprom.