Israeli military digger works on the border with Lebanon in the northern Israeli town of Metula, Tuesday, Dec. 4, 2018. The Israeli military launched an operation on Tuesday to "expose and thwart" tunnels built by the Hezbollah militant group it says stretch from Lebanon into northern Israel. (AP Photo/Ariel Schalit)

Israeli military digger works on the border with Lebanon in the northern Israeli town of Metula, Tuesday, Dec. 4, 2018. The Israeli military launched an operation on Tuesday to "expose and thwart" tunnels built by the Hezbollah militant group it says stretch from Lebanon into northern Israel. (AP Photo/Ariel Schalit)

Israeli military digger works on the border with Lebanon in the northern Israeli town of Metula, Tuesday, Dec. 4, 2018. The Israeli military launched an operation on Tuesday to "expose and thwart" tunnels built by the Hezbollah militant group it says stretch from Lebanon into northern Israel. (AP Photo/Ariel Schalit)

An Israeli military digger works on the Lebanese-Israeli border next to a wall that was built by Israel in the southern village of Kafr Kila, Lebanon, Tuesday, Dec. 4, 2018. The Israeli military launched an operation on Tuesday to "expose and thwart" tunnels it says were built by the Hezbollah militant group that stretch from Lebanon into northern Israel. (AP Photo/Mohammed Zaatari)

An Israeli military digger works on the Lebanese-Israeli border next to a wall that was built by Israel in the southern village of Kafr Kila, Lebanon, Tuesday, Dec. 4, 2018. The Israeli military launched an operation on Tuesday to "expose and thwart" tunnels it says were built by the Hezbollah militant group that stretch from Lebanon into northern Israel. (AP Photo/Mohammed Zaatari)

Indonesian U.N peacekeepers stand in front a poster of Hezbollah leader Sheik Hassan Nasrallah, as they patrol the Lebanese side of the Lebanese-Israeli border in the southern village of Kfar Kila, Lebanon, Tuesday, Dec. 4, 2018. The Israeli military launched an operation on Tuesday to "expose and thwart" tunnels it says were built by the Hezbollah militant group that stretch from Lebanon into northern Israel. (AP Photo/Mohammed Zaatari)

Lebanese armored vehicle patrols the Lebanese side of the Lebanese-Israeli border in the southern village of Kfar Kila, Lebanon, Tuesday, Dec. 4, 2018. The Israeli military launched an operation on Tuesday to "expose and thwart" tunnels it says were built by the Hezbollah militant group that stretch from Lebanon into northern Israel. (AP Photo/Mohammed Zaatari)

An Israeli military digger works on the Lebanese-Israeli border next to a wall that was built by Israel in the southern village of Kafr Kila, Lebanon, Tuesday, Dec. 4, 2018. The Israeli military launched an operation on Tuesday to "expose and thwart" tunnels it says were built by the Hezbollah militant group that stretch from Lebanon into northern Israel. (AP Photo/Mohammed Zaatari)

Israeli military diggers work on the Lebanese-Israeli border next to a wall that was built by Israel in the southern village of Kafr Kila, Lebanon, Tuesday, Dec. 4, 2018. The Israeli military launched an operation on Tuesday to "expose and thwart" tunnels it says were built by the Hezbollah militant group that stretch from Lebanon into northern Israel. (AP Photo/Mohammed Zaatari)

Serbian U.N peacekeepers patrol the Lebanese side of the Lebanese-Israeli border in the southern village of Kfar Kila, Lebanon, Tuesday, Dec. 4, 2018. The Israeli military launched an operation on Tuesday to "expose and thwart" tunnels it says were built by the Hezbollah militant group that stretch from Lebanon into northern Israel. (AP Photo/Mohammed Zaatari)