Israeli Prime Minister Benjamin Netanyahu on Monday vowed to hit Hezbollah without mercy, a day after the Iran-backed Lebanese group’s deadliest strike on Israel since the start of the war in late September.

Hezbollah’s drone attack on an Israeli base killed four soldiers on Sunday, while volunteer rescuers said another 60 people were injured.

“We will continue to mercilessly strike Hezbollah in all parts of Lebanon –- including Beirut,” Netanyahu said on a visit to the base near Binyamina, south of Haifa.