- Hezbollah calls it biggest security breach in war with Israel
- At least two Hezbollah fighters killed, the group says
- Iranian ambassador to Lebanon reportedly injured
- Lebanese Red Cross dispatches over 50 ambulances, 300 medics
- Injuries to limbs, face and eyes
A Hezbollah official, speaking on condition of anonymity, said the detonation of the pagers was the "biggest security breach" the group had been subjected to in nearly a year of conflict with Israel.
Israel and the Hezbollah have been engaged in cross-border warfare in parallel with the Gaza war which erupted last October, the worst such escalation in years.
The Israeli military declined to comment on Reuters enquiries about the detonations.
Hezbollah confirmed in a statement the deaths of at least three people, including two of its fighters. The third person killed was a girl, it said, adding that an investigation was being conducted into the causes of the blasts.
One of the fighters killed was the son of a Hezbollah member of the Lebanese parliament, two security sources told Reuters.
Iran's ambassador to Lebanon, Mojtaba Amani, suffered a minor injury when a pager exploded, Iran's semi-official Fars news agency reported.
"Amani has a superficial injury and is currently under observation in a hospital," Fars quoted a source as saying.
Reuters could not immediately confirm the report.
The pagers that detonated were the latest model brought in by Hezbollah in recent months, three security sources said.
A Reuters journalist saw ambulances rushing through the southern suburbs of the capital Beirut, a Hezbollah stronghold, amid widespread panic. A security source said that devices were also exploding in the south of Lebanon.
At Mt. Lebanon hospital, a Reuters reporter saw motorcycles rushing to the emergency room, where people with their hands bloodied were screaming in pain.
The head of the Nabatieh public hospital in the south of the country, Hassan Wazni, told Reuters that around 40 wounded people were being treated at his facility. The wounds included injuries to the face, eyes and limbs.
The wave of explosions lasted around an hour after the initial detonations, which took place about 3:45 p.m. local time (1345 GMT). It was not immediately clear how the devices were detonated.
Lebanese internal security forces said a number of wireless communication devices were detonated across Lebanon, especially in Beirut's southern suburbs, leading to injuries.
Groups of people huddled at the entrance of buildings to check on people they knew who may have been wounded, the Reuters journalist said.
Regional broadcasters carrying CCTV footage which showed what appeared to be a small handheld device placed next to a grocery store cashier where an individual was paying spontaneously exploding.
In other footage, an explosion appeared to knock out someone standing at a fruit stand at a market area.
Lebanon's crisis operations center, which is run by the health ministry, asked all medical workers to head to their respective hospitals to help cope with the massive numbers of wounded coming in for urgent care. It said health care workers should not use pagers.
The Lebanese Red Cross said more than 50 ambulances and 300 emergency medical staff were dispatched to help in the evacuation of victims.
