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,

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In a period replete with violent attacks across the region—from Israel’s bombardment of the Gaza Strip to the targeted assassinations of militant leaders in Iran and Lebanon—this was perhaps the most sophisticated and daring one yet.

Lebanese officials say more handheld devices exploded a day after thousands of pagers carried by Hezbollah members blew up in an attack blamed on Israel.

Hezbollah says it is acting in support of Hamas - which is also backed by Iran and proscribed as a terrorist organisation by Israel and many Western countries - and will only stop its attacks once the fighting in Gaza ends.

Pagers used by hundreds of members of Hezbollah exploded almost simultaneously in Lebanon and Syria Tuesday, killing at least 12 people.