Lebanon's Hezbollah said that both Israeli drones which crashed in Beirut's southern suburbs on Sunday were carrying explosives.
Hezbollah had previously claimed that only one of the drones had been carrying explosives.
The suburbs "were subjected to an attack by rigged drones", with the first one failing to cause a blast, according to the group, failing to cause a blast and the second exploding, the Iran-backed movement said on Monday.
Hezbollah experts examined the first drone, finding that it carried 5.5 kilograms of C4 explosives, according to the official Lebanese news agency NNA.
While Israel has not claimed responsibility for the Beirut drone attack, Nasrallah deemed it the first Israeli attack inside Lebanon since the two sides fought a month-long war in 2006.
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Only hours later, a Palestinian faction said Israeli drones had struck a military position it holds in Lebanon's Bekaa valley before dawn on Monday.
"What happened was similar to a declaration of war which allows us to resort to our right to defending our sovereignty," the Lebanese president's office quoted Aoun, a political ally of Hezbollah, as saying on Twitter on Monday.