Kazakhstan on Tuesday exposed ExxonMobil as the only member of an international oil group led by Eni of Italy unwilling to surrender part of its equity in the giant Kashagan oilfield to KazMunaigas, the Kazakh state oil company.

“ExxonMobil does not share the opinion of other members of the consortium,” Sauat Mynbaev, Kazakhstan’s minister of energy, told reporters in Astana, the Kazakh capital.