Mourners gather for Hezbollah member's funeral

Mourners gathered in the town Kfar Malki for the funeral of Hezbollah member Ali Mohamed Chalbi, after he was killed when a hand-held radio used by the group detonated.

Lebanon's health ministry said 25 people were killed and hundreds were injured in the attack in Beirut's suburbs and the Bekaa Valley, while the death toll from explosions in pagers rose to 12, including two children, with nearly 3,000 injured.

Israel has not directly commented on the attacks, which security sources say were probably carried out by its Mossad spy agency.

The operations, which appeared to throw Hezbollah into disarray, played out alongside Israel's 11-month-old war in Gaza and heightened fears of an escalation on its Lebanese border and the risk of a full-blown regional war.

Hezbollah leader Sayyed Hassan Nasrallah denounced the deadly Israeli attacks that blew up radios and pagers across Lebanon, describing it as a potential "declaration of war".

As the broadcast was aired, deafening sonic booms from Israeli warplanes shook Beirut, a sound that has become common in recent months but has taken on a greater significance as the threat of all-out war has steadily ramped up.

Nasrallah described the attacks as unprecedented, accusing Israel of trying to kill thousands, whilst he also played down the impact on Hezbollah, saying the group's structure had not been shaken.

Israel said its warplanes struck southern Lebanon overnight. Hezbollah reported that airstrikes resumed in the border area in the afternoon.

Lebanon and Hezbollah have blamed Israel for the device blasts 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.

The attacks on Hezbollah’s communications equipment have instilled fear across Lebanon, prompting many to abandon their electronic devices out of concern they might be carrying hidden bombs.