Electronic device explosions in Lebanon will be met with "just retribution," Iran's president Masoud Pezeshkian has said. Pager blasts killed 12 and injured more than 2,000 on Tuesday before walkie-talkies detonated on Wednesday, killing 20 and injuring at least 450.

Iranian President Masoud Pezeshkian on Wednesday condemned the West and the coordinated explosions of hundreds of portable radio receivers in Lebanon as a "disgrace." Pezeshkian levelled serious accusations at Israel's ally,

Lebanon and Hezbollah have blamed Israel for the attacks on Tuesday and Wednesday that killed 37 people and wounded around 3,000, although Israel has not directly commented on the attacks, which security sources say were probably carried out by its Mossad spy agency.

In Lebanon, exploding pagers and booby-trapped walkie-talkies – believed to be set off by Israel – have rattled Hezbollah and captured the world’s attention. What do they portend?

Hezbollah admits Israel dealt a severe blow with exploding pagers and walkie talkies, but neither side seems to heed U.S. calls to avoid a wider war.

The source of Wednesday’s explosions was not immediately clear, but the blasts came a day after thousands of pagers used by Hezbollah blew up across Lebanon.

By Jonathan Saul, Steven Scheer and Ari Rabinovitch LONDON/JERUSALEM (Reuters) - The mass pager attack against Hezbollah in Lebanon has turned the spotlight on Israel's secretive Unit 8200, the Israel Defense Forces' intelligence unit,