During a tour of the Golan Heights, Defense Minister Ehud Barak gave a scathing assessment of Syrian President Bashar Assad’s forces and said Israel will remain ‘‘vigilant and alert.’’

‘‘Almost all of the villages, from the foot of this ridge to the very top, are already in the hands of the Syrian rebels,’’ said Barak, who was accompanied by Prime Minister Benjamin Netanyahu. ‘‘The Syrian army is displaying ever-diminishing efficiency.’’

The civil war in Syria has renewed tensions over the Golan Heights, a strategic plateau that Israel captured from Syria in 1967. Despite hostility between the two countries, Syria has been careful to keep the border quiet since the 1973 Mideast war.