NAQURA: Israel and Lebanon struck a US-brok­ered maritime border agreement on Thursday that opens up lucrative offshore gas fields for the neighbours that remain technically at war.

US President Joe Biden hailed the “historic” deal that comes as Western powers clamour to open up new energy production and reduce vulnerability to supply cuts from Russia.

The agreement was signed separately by Lebanon’s President Michel Aoun in Beirut and by Israel’s Prime Minister Yair Lapid in Jerusalem, and went into effect after the papers were delivered to mediators.

“Both parties took the final steps to bring the agreement into force and submitted the final paperwork to the United Nations in the pre­s­ence of the United Stat­es,” Biden said in a statement.

Israel’s arch-foe, the Leba­nese Hezbollah group, said it would end its “exceptional” mobilisation against the cou­ntry, after threatening to att­a­­ck Israel for months should it reach for offshore gas reser­ves at the border before the deal was signed. “Our mission is complete,” Hezb­ollah leader Hassan Nasr­allah said in a televised speech.

The deal comes as Lebanon hopes to extract itself from what the World Bank calls one of the world’s worst economic crises in modern history, and as Lapid seeks to lock in a major achievement days ahead of a general election on November 1.

The exchange of letters was held in the southern Lebanese border town of Naqura, in the presence of US mediator Amos Hochstein and UN Special Coordinator for Lebanon Joanna Wron­ecka, who will now deposit the new maritime coordinates at the UN headquarters in New York.

Biden said that “energy — particularly in the Eastern Mediterranean — should not be a cause for conflict, but a tool for cooperation, stability, security and prosperity. “This agreement takes us one step closer to realising a vision for a Middle East that is more secure, integrated and prosperous, delivering benefits for all the people of the region.”

Hours before signing it, Lapid had claimed that Lebanon’s intention to ink the deal amounted to a de facto recognition of the Jewish state. “It is not every day that an enemy state recognises the State of Israel, in a written agreement, in front of the entire international community,” he said.

Aoun denied Lapid’s assertion, countering that “demarcating the southern maritime border is technical work that has no political implications”.

The deal comes as political parties in Israel — including Lapid’s centrist Yesh Atid — jockey for position in what will be the fifth general election in less than four years.

Veteran right-winger and longtime premier Benjamin Netanyahu has his sights set on a comeback and he dismissed the maritime deal as an “illegal ploy” early this month.

London-listed Energean on Wednesday said it began producing gas from Karish, an offshore field at the heart of the border agreement, a day after Israel gave the green light.