The 34-kilometre (21-mile) fence runs along Israel's border with Jordan, beginning near the Israeli Red Sea resort of Eilat and reaching the site of a new airport being constructed in the Timna Valley.

The fence, 6 metres (20 feet) high, is part of a broader strategy by Israel to surround itself by barriers, including at its southwestern border with Egypt, to prevent militants and migrants crossing the border illegally.

Part of the new segment is accompanied by a 26-metre "net" developed specifically to protect the new Ramon airport.

The missile fence is designed to intercept projectiles and surface-to-surface missiles, the official told AFP.

Neighbouring Jordan is one of only two Arab states to have a peace treaty with Israel, but is home to some extremist sympathisers and a number of radical clerics.

The airport, some 19 kilometres north of Eilat, is expected to begin operation in late 2018 or early 2019 and boost tourism in the area.