 In the following year, Polish oil refiner Lotos and PGNiG signed a deal to jointly explore for Norwegian offshore oil.Following the Russia–Ukraine gas dispute in 2009, Poland and PGNiG began construction of the President Lech Kaczyński LNG Terminal.In 2011, PGNiG purchased 99.8% of Vattenfall Heat Poland's assets for PLN 2.96bn, becoming the owner of Elektrociepłownia Warszawskie.