The paper describes the level of sophistication the tunnels are being built with, noting that they include underground ventilation systems which prevents moisture from damaging equipment.
Israel is also carefully watching the Golan Heights, which Israel acquired in 1967 and later annexed, along the border with Syria.
Several thousand Syrian refugees are living in camps in Juroud Arsal, the area of the joint operation.
Who will fill Islamic State vacuum after Raqqa?
Kurdish, Arab fighters open offensive on Syria's last ISIS stronghold, occupied since 2013.
Islamic State claimed responsibility for the killing of the professor for "calling to atheism," the US-based SITE monitoring service said quoting the militant group's Amaq Agency.
Suspected of working on behalf of Iran's elite military al-Quds Force, two Kenyans were arrested before carrying out a terror attack on multiple tourist sites.
Hassan Nasrallah said what he called "takfiri terrorist groups" had insulted Islam more than "even those who have attacked the messenger of God."