Social media posts sought to link the strike to a series of other US attacks on al-Qaeda affiliates in northern Syria in which US drones have used such a weapon.
The finding should put Iran on the back-foot regarding implementation of resolution 2231 which is linked to the 2015 Iran Deal.
Israel is also a pioneer in laser technology.
Two airport security staff and two Cham Wings employees are suspected of having tracked Soleimani's final movements at Damascus airport.
The drones "passed over the Beirut Airport, endangering air traffic." One of the drones was carrying 4.5 kg of explosives.
Iran has denied any involvement in the assault that initially halved Saudi Arabia's oil production.
He said he had also authorized the use of the U.S. emergency oil stockpile to ensure stable supplies after the attack, which shut 5% of world production.
The full details of the most recent attack on September 14 were not available on Saturday morning and it was not clear where the drones had come from.
Israeli military identifies Iranian officers behind clandestine missile project; Lebanese government held responsible for project despite being unaware of it