A Lebanese security official and a Hezbollah official said assailants shot al-Laqis with a pistol equipped with a silencer at close range after he parked his car in the parking garage on the ground floor of the residential building where he lived in the Hadath neighborhood, some two miles (three kilometers) southwest of Beirut.
He was struck by five bullets in the head and neck, the Lebanese official said, speaking on condition of anonymity in line with regulations.
The Hezbollah official spoke on condition of anonymity as he wasn't authorized to speak to journalists.
Footage from the scene broadcast on Hezbollah's al-Manar television station showed the parking lot stained with muddied footprints that led to a nearby small olive grove.
Yellow police tape blocked off the area.
Al-Laqis was rushed to a nearby hospital but died early Wednesday from his wounds, the officials said.
The Lebanese state news agency later published a photograph it identified as al-Laqis.
The image showed a man who appeared to be in his mid-40s, with neatly cut black hair and a graying close-cropped beard, wearing beige-and-khaki military clothing.
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