The United Nations headquarters building is pictured though a window with the UN logo in the foreground in the Manhattan borough of New York, Aug. 15, 2014. Photo: REUTERS/Carlo Allegri

A survey conducted by the United Nations Interim Force in Lebanon last month found that a wall built by the Israeli military crosses the Blue Line, the de facto border, a U.N. spokesperson said on Friday

The Blue Line is a U.N.-mapped line separating Lebanon from Israel and the Israeli-occupied Golan Heights.

Stephane Dujarric, the spokesperson for the U.N. secretary-general, said the concrete T-wall erected by the IDF has made more than 4,000 square meters (nearly an acre) of Lebanese territory inaccessible to the local population.

A section of an additional wall, which has also crossed the Blue Line, is being erected southeast of Yaroun, he said, citing the peacekeepers.

Dujarric said UNIFIL informed the Israeli military of its findings and requested that the wall be removed.

“Israeli presence and construction in Lebanese territory are violations of Security Council resolution 1701 and of Lebanon’s sovereignty and territorial integrity,” UNIFIL said in a separate statement.

An Israeli military spokesperson denied the wall crossed the Blue Line.

“The wall is part of a broader IDF plan whose construction began in 2022. Since the start of the war, and as part of lessons learned from it, the IDF has been advancing a series of measures, including reinforcing the physical barrier along the northern border,” the spokesperson said.

UNIFIL, established in 1978, operates between the Litani River in the north and the Blue Line in the south. The mission has more than 10,000 troops from 50 countries and about 800 civilian staff, according to its website.