The Reuters news agency quoted local security sources as saying five people were killed in the blast, including the Hezbollah man and his son. Hezbollah denied anyone was killed in the explosion.
The organization's spokesman, Ibrahim al-Moussawi, later said that only one person was seriously hurt and that the circumstances of the blast were being investigated. The Associated Press reported of one person who died in the explosion.
The village where the explosion took place is located near the southern bank of the Litani River. According to the official Lebanese news agency, the building was completely destroyed in the explosion. Ambulances were dispatched to the area and evacuated the injured to a hospital in Nabatiya.
The French news agency quoted a local security sources as saying that Issa was injured while trying to defuse a missile left in the area from the Second Lebanon War in 2006.
Following the incident the Lebanese army deployed large forces in the village, and security sources estimated that the blast was the result of an ammunition detonation.