The United Nations has accused Israel of “severe violations” of a 50-year-old agreement with Syria, saying it has engaged in “engineering groundwork activities” that encroach on a key buffer zone in the Golan Heights.

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.

The work, which UNDOF said began in July, follows the completion by the Israeli military of new roadways and what appears to be a buffer zone along the Gaza Strip’s frontier wit