 Allegedly, Gazprom, a Russian natural-gas extraction company, had asked Mogilevich to oversee natural-gas deliveries from Russia to Ukraine via gas intermediary RosUkrEnergo.All parties deny connections with Mogilevich.Other cables said Firtash and Mogilevich were linked through offshore companies either by joint ownership through former spouses or through Firtash-headed companies in which Mogilevich's former spouse was the shareholder.