U.N. peacekeepers are staying in their positions on Lebanon’s southern border despite Israel’s request to vacate some areas before it launched its ground operation against Hezbollah militants, the U.N. peacekeeping chief said Thursday. Jean-Pierre Lacroix said the commander and liaison officers from the U.N. force, known as UNIFIL, also are in constant contact with their counterparts in the Israeli and Lebanese militaries. He called that key to protecting the U.N.’s more than 10,000 peacekeepers. The U.N. force is “the only channel of communications between the parties,” he told reporters. “The peacekeepers are also working with partners to do what they can to protect the population.” UNIFIL was created to oversee the withdrawal of Israeli troops from southern Lebanon after Israel’s 1978 invasion. The U.N. expanded its mission following the 2006 war between Israel and Hezbollah, allowing peacekeepers to deploy along the Israeli border. A U.N. Security Council resolution ending that war demanded that all armed groups — including Hezbollah — be disarmed and that the Lebanese army deploy throughout the country to the Israeli border. After 17 years, neither has happened. Lacroix, who is undersecretary-general for peace operations, said UNIFIL had anticipated “a limited, targeted ground operation” and had thoroughly discussed whether U.N. peacekeepers should stay or not, deciding they should stay for now. Read: US Embassy expresses sadness over attack on 3 Bangladeshi UN peacekeepers in Mali “We’re constantly reviewing the situation” on the ground in terms of the safety and security of the peacekeepers, he said. He added that contingency plans are ready but refused to discuss them. Lacroix also stressed that Israel and Hezbollah have an obligation to protect the U.N. peacekeepers. Israeli ground forces crossed into southern Lebanon early Tuesday, which along with stepped-up airstrikes marked a significant escalation against Iranian-backed Hezbollah militants and of the war in the Middle East. The fighting comes as the region braces for Israel’s response to Iran's ballistic missile attack. Hezbollah began firing across the border after Iranian-backed Hamas militants carried out attacks on Israel on Oct. 7 and then Israel retaliated with its military offensive in Gaza. Lacroix said that there were a few “issues” after Israel's ground operation in Lebanon began, which he wouldn’t go into, but that the U.N. liaison mechanism with its Israeli and Lebanese counterparts was “effective in addressing those issues.” Read more: 2 UN peacekeepers killed in 6th incident in Mali in 2 weeks Lacroix said UNIFIL at the moment is not carrying out patrols, which it would normally do, but its positions are manned. In some places, the number of peacekeepers has been reduced by about 20%, he said. When Lacroix was asked whether Israeli fire was coming too close to its bases or positions, he replied that one of the added values of the liaison operation is “to prevent and deal with possible incidents that would have the potential of affecting the safety, the security of our peacekeepers.” The liaison officers also are dealing with other activities, including military movements, he said. Lacroix said UNIFIL had been supporting civilian efforts to supply humanitarian assistance to people in southern Lebanon. The peacekeepers are still trying to help and “are playing a role as much as possible,” he said.