Hezbollah chief Hassan Nasrallah warned Israel Wednesday against waging war on Lebanon, a day after a strike blamed on Israel killed Hamas’s number two in the group’s southern Beirut suburbs stronghold.

“If the enemy thinks of waging a war on Lebanon, we will fight without restraint, without rules, without limits and without restrictions,” Nasrallah said in a televised speech. “We are not afraid of war,” he added.

During nearly three months of fighting between Israel and Hamas in Gaza, the Israeli army has also been exchanging cross-border fire with Hezbollah, which is allied with the Palestinian militants and Iran.

Lebanese authorities and Hamas accused Israel of killing Salah al-Aruri in Beirut’s southern suburbs on Tuesday with six others.