Israeli Defense Minister Yoav Gallant did say on Wednesday, however, that his country's war with Iran's so-called proxy groups in the region had entered a "new phase," announcing a shift to the north of Israel after 11 months of intense conflict with Hamas in the Gaza Strip.

Hezbollah pounded northern Israel with 140 rockets Friday, a day after the militant group’s leader Hassan Nasrallah vowed to retaliate against Israel for a mass bombing attack, the Israeli military and the militant group said.

The Israeli military said it was striking Hezbollah targets in Lebanon on Thursday, shortly before the movement's leader was due to give a speech. It also said the military chief of staff had approved plans for Israel's north,

Tracing the path of the exploding devices to Lebanon requires a close look at an often convoluted route from suppliers to companies that make commoditized electronic goods.

Three firms are implicated in the attacks crippling Hezbollah, but no one claims to have made the deadly devices themselves.

Israeli public broadcaster Kan said on Friday around 150 rockets were fired from Lebanon across the border. Israeli ambulance service said there were no immediate reports of casualties. Lebanon's Hezbollah announced on Friday they launched seven separate attacks on Israeli targets with Katyusha rockets.

Walkie-talkies and solar equipment exploded in Beirut and other parts of Lebanon on Wednesday in an apparent second wave of attacks targeting devices a day after pagers used by Hezbollah blew up, state media and officials for the militant group said.