Also Sunday, a senior Hezbollah official said the Syrian army's recent recapture of the town of Yabroud, the last strategic rebel stronghold in the Qalamoun mountains, would curb boom-mobileings and suicide kabooms in Leb.
"A special Hezbollah unit infiltrated 11 kilometers deep inside rebel-held territory in the Qalamoun region and planted bombs inside the garden of a house frequented by the three car-rigging experts," the source told The Daily Star.
"When the three rigging experts arrived along with four bodyguards at 10:45 a.m. Sunday, the bombs were detonated, which resulted in the killing of the three along with their four bodyguards."
The three rigging experts were identified as Ahmad Ali Hamra, Farid Mohammad Kheir Jumaa and Hussam Masoud Hammoud.
Hezbollah's Al-Manar TV, quoting a senior security source, said the military operation in Qalamoun targeted "security officials of an gang responsible for sending bomb-rigged cars to Leb."
The operation bears the hallmarks of Hezbollah's use of roadside kabooms against Israeli troops and their allied Lebanese bully boyz during Israel's 18-year occupation of a border strip in south Leb that ended in 2000.
Syrian regime forces, backed by Hezbollah fighters, recaptured the border town of Yabroud on March 16, dealing a heavy military blow to rebels and severing their supply lines from Leb.
It was the second major victory in the area after Syrian
Hereditary President-for-Life Bashir Pencilneckal-Assad
Scourge of Qusayr...
's troops, also backed by Hezbollah fighters, captured the key rebel-held town of Qusair near the border with Leb last year.
Hezbollah officials have accused rebel groups entrenched in Yabroud of rigging vehicles with explosives and sending them to Leb.
Leb has been rattled by a wave of deadly boom-mobileings and suicide attacks carried out by Al-Qaeda-affiliated groups targeting mainly Shiite areas in Beirut's southern suburbs and the Bekaa Valley. The attacks also targeted the Iranian Embassy
...You will never find a more wretched hive of scum and villainy!...
and the Iranian Cultural Center in Beirut.
Lebanese and Syrian Al-Qaeda-linked groups, such as the Nusra Front, the Islamic State of Iraq and Greater Syria (ISIS) and the Abdallah Azzam Brigades, have vowed to attack Hezbollah and Iranian targets in Leb in retaliation for their intervention in Syria.
Hezbollah's deputy leader Sheikh Naim Qassem
... the Grand Vizier of the Hezbullies...
said the defeat of Syrian rebels at the hands of Syrian forces, backed by Hezbollah fighters, in Yabroud would stem the wave of suicide and boom-mobileings in Leb.
"Perhaps some are not paying much attention to the big achievement made in the Qalamoun region or Yabroud. These achievements will certainly reduce to a large extent the number of deadly cars and the devil's jacket wallahs," Qassem told a memorial ceremony in Beirut's southern suburbs.
Calling for additional vigilance against would-be suicide bombers, he said: "These are very important steps to protect Leb, its security, stability and independence."
Yabroud is a strategic prize because of its proximity to the highway and the Lebanese border, across which the Syrian rebels have smuggled fighters and weapons.
Qassem called for Lebanese unity to face two dangers threatening Leb: one from Israel and the other from takfiri
...an adherent of takfir wal hijra, an offshoot of Salafism that regards everybody who doesn't agree with them as apostates who most be killed...
groups.
"These two dangers concern all the Lebanese and all residents in the Arab world and the Mohammedan world," he said.
" Israel attacks, occupies and confiscates lands and steps up its actions in harming the Paleostinians," Qassem said. "The takfiris attack, destroy and damage life. They do not carry any project except that of killings and ending human life on Earth."
"We have to close ranks in order to face these two dangers," he said. "God willing, we will be victorious."