This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows an Israeli soldier walking past a digger across the border in northern Israel, as Israel launched an opration to destroy detected Hezbollah tunnels. - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Ali DIA / AFP)

This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows Israeli soldiers carrying a crate as they walk towards an excavator across the border in northern Israel, as Israel launched an opration to destroy detected Hezbollah tunnels. - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Ali DIA / AFP)

This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows UN vehicles patrolling along the border wall with Israel. - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Ali DIA / AFP)

This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows UN vehicles patrolling along the border with Israel. - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Ali DIA / AFP)

This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows a view of the border with Israel, with Israeli vehicles driving on the right side and UN and Lebanese vehicles driving on the left. - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Ali DIA / AFP)

This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows a view of Israeli machinery operating behind the border wall in Israel (R). - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Ali DIA / AFP)

This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows a view of Israeli machinery operating behind the border wall in Israel (R). - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Ali DIA / AFP)

This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows a view of Israeli machinery operating behind the border wall in Israel (R). - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Ali DIA / AFP)

This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows a view of Israeli machinery operating behind the border wall in Israel (top). - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Ali DIA / AFP)

TOPSHOT - This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows a view of the border with Israel, with Israeli vehicles driving on the right side and UN and Lebanese vehicles driving on the left. - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Ali DIA / AFP)

This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows a view of Israeli machinery operating behind the border wall in Israel (top). - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Mahmoud ZAYYAT / AFP)

This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows a view of Israeli machinery operating behind the border wall in Israel (R). - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Mahmoud ZAYYAT / AFP)

This picture taken on December 4, 2018 from the southern Lebanese village of Kfar Kila shows a view of Israeli machinery operating behind the border wall in Israel (top). - Israel's army said on December 4 it had detected Hezbollah "attack tunnels" infiltrating its territory from Lebanon and had launched an operation called "Northern Shield" to destroy them, a move likely to raise tensions with the Iran-backed group. (Photo by Mahmoud ZAYYAT / AFP)