Ya'alon, who was speaking at the Israel's Calcalist economy conference, said the Iron Dome anti-missile defense system had saved Israel.
Search teams have located on Sunday the wreckage of a Turkish jet shot down by Syria.
Diplomatic officials said that the wreckage of jet was located at depth of 1,300 metres.Search and rescue teams are still searching for the two missing pilots.
Islamic State militants have captured the Syrain regime's final military outpost in al-Raqqah province
Israeli army radio had reported earlier Wednesday that three mortar shells fired from Syria had fallen to earth in the Israeli-held Golan Heights.
The Syrian military dropped chlorine gas in barrel bombs on civilian areas in April, the UN commission on Syria said.
United States President Barack Obama has authorized surveillance of Islamic State bases in Syria.
A female pilot and fellow flyer eject from a jet fighter plane after the engine caught fire
A political crisis in Pakistan means many are watching out for the army's reaction but the army itself is denying any involvement
The two had spent three months in Israeli administrative detention