The army and Hezbollah have said the two drones, which went down on Sunday, were Israeli. They said one exploded and one crashed in the Hezbollah-dominated southern suburbs of Beirut, causing damage to the group's media center.
A security official in the region has described the target of the drone strikes as linked to precision-guided missile projects.
Israel on Thursday accused Iran of stepping up efforts to provide Hezbollah with precision-guided missile production facilities.