Israel’s Delek Group says negotiations to purchase a majority stake in the EMG offshore gas pipeline which links Israel and  Egypt are proving “difficult.” The firm is a partner in Israel’s two key offshore gas projects, the producing 10tcf Tamar and the 22tcf Leviathan, which is due online in late-2019.

Delek and its main partner offshore Israel, Texas-based Noble Energy, which operates both Tamar and Leviathan, hopes that buying a controling stake in the...