Lebanon and Israel resumed negotiations on their disputed maritime border today.

The indirect talks began in the morning and lasted five hours, the deliberations mediated by the United Nations and the United States. Lebanese officials brought the US delegation to the southern city of Naqoura, where the talks took place near UN and Lebanese army-controlled areas, the Lebanese state’s official National News Agency reported.

The two states have a disputed sea border in the eastern Mediterranean Sea. The border demarcation is important due to the presence of gas in the waters. Israel already pumps gas from its fields in the sea, but Lebanon has yet to extract any. Lebanon and Israel are technically in a state of war and lack formal relations. Israel and the Lebanese group Hezbollah clash from time to time on the border. The National News Agency referred to Israel as the “Israeli enemy” in its report.

US-mediated negotiations on the sea border began in October of last year, but ended in November without an agreement. In December, then-US Secretary of State Mike Pompeo said the two sides “remain far apart” despite their “goodwill.”