US envoy Amos Hochstein arrived in Beirut Sunday to push talks to resolve a bitter maritime border dispute between Lebanon and Israel over Mediterranean waters with offshore gas fields. "Reaching a resolution is both necessary and possible, but can only be done through negotiations and diplomacy," the US State Department said in a statement ahead of Hochsteins visit. Washingtons envoy for global infrastructure and investment is "facilitating negotiations between Lebanon and Israel on the maritime boundary", the statement added. Hochstein met with Lebanons Energy Minister Walid Fayyad on Sunday, and was scheduled to meet with President Michel Aoun and Prime Minister Najib Mikati the following day. The maritime border dispute between Lebanon and Israel escalated in early June, after Israel moved a production vessel to the Karish offshore field, which is partly claimed by Lebanon. The move prompted Beirut to call for the resumption of US-mediated negotiations on the demarcation dispute. Lebanon and Israel have no diplomatic relations and are separated by a UN-patrolled border. They had resumed maritime border negotiations in 2020 but the process was stalled by Beiruts claim that the map used by the United Nations in the talks needed modifying. Lebanon initially demanded 860 square kilometers (330 square miles) of territory in the disputed maritime area but then asked for an additional 1,430 square kilometers, including part of the Karish field. Israel claims that the field lies in its waters and is not part of the disputed area subject to ongoing negotiations. Hezbollah threats A Lebanese official in mid-June said Beirut had made a new offer to Hochstein, holding back on demands for territory where Israel planned to imminently extract gas. Beirut was pushing for the countrys maritime border to exclude Karish and include the whole of a nearby field instead, the official told AFP at the time. An Israeli official on Sunday called Hochsteins latest visit a "moment of truth" and said Israels offer, which related to the original disputed zones, was a "compromise to both sides". "The offer we presented is one that would enable Lebanon to develop the reservoir that is in the disputed area," the official told AFP on condition of anonymity. "The goal of the offer is to allow the Lebanese to develop it, while safeguarding Israels economic and other interests," the official added, referring to "the Sidon reservoir", known as the Qana field in Lebanon. On July 2, Israel said it had downed three drones launched by Lebanons Iran-backed Hezbollah that were headed towards the Karish gas field. The party on Sunday released a short video it said showed surveillance of several Israeli-chartered energy infrastructure ships, including the production vessel sent to Karish which is operated by London-listed firm Energean. The video, which also contains a rare glimpse of Hezbollah weaponry, was broadcast on the groups Al-Manar TV station hours before Hochstein was scheduled to meet Lebanese officials in Beirut. It was issued by Hezbollahs War Media that the group uses to broadcast footage of military operations and battles, and contains images of ships involved in drilling for and extracting hydrocarbons, along with what appear to be their coordinates. The video begins with the words of Hezbollah leader Hassan Nasrallah during a recent speech in which he warned that "playing with time is not useful" on the maritime issue. "The message is a serous threat," a top Al-Manar correspondent said on Twitter. Nasrallah earlier this month warned that if Lebanon was prevented from extracting oil and gas from its waters, "nobody" would be able to do so, adding that Israeli offshore fields were "under threat" from the groups missiles. Israel and Hezbollah last fought a devastating war in 2006.