The United Nations says Israeli construction along a demilitarised buffer zone with Syria has led to “severe violations” of a 50-year-old ceasefire agreement, which risk increasing tensions along their shared frontier in the occupied Golan Heights.

United Nations peacekeepers warned Tuesday that the Israeli military has committed severe violations of a cease-fire deal with Syria as its military continues a major construction project along the so-called Alpha Line that separates the Israeli-occupied Golan Heights from Syria.