Thousands of walkie-talkies, solar panels and fingerprint recognition devices used by Hezbollah fighters have detonated across Lebanon, killing 20 and wounding hundreds of people including mourners at a funeral, witnesses and security sources have reported.

The second wave of carnage comes a day after thousands of exploding pagers used by the group left almost 3,000 people injured and a dozen dead, including civilians and children.

Security sources have now confirmed that hand-held radios were purchased by Hezbollah five months ago, at around the same time as the compromised pagers.  Lebanese media has also reported that home solar energy systems have blown up in several areas of Beirut.

The attacks amount to the biggest security breach in Hezbollah's history, with the  group and its backers Iran condemning Israel and labelling it 'mass murder'. 

Israel has since declared the start of a 'new phase' of war in the Middle East, though it was careful not making any official comment on the pager or walkie-talkie explosions.  

The latest explosions this afternoon have hit the country's south and the capital Beirut, where dramatic time-lapse video shows multiple plumes of smoke rising above the skyline in different locations almost simultaneously.

The attacks amount to the biggest security breach in Hezbollah's history, with the  group and its backers Iran condemning Israel and labelling it 'mass murder'. 

Israel has since declared the start of a 'new phase' of war in the Middle East, though it was careful not making any official comment on the pager or walkie-talkie explosions.  

The latest explosions this afternoon have hit the country's south and the capital Beirut, where dramatic time-lapse video shows multiple plumes of smoke rising above the skyline in different locations almost simultaneously.

Beirut's hospitals are reportedly still at full capacity following yesterday's attacks, with medical aid being rapidly diverted to the already crippled country as it deals with the catastrophe.