Brigades in Gaza on Friday said advances in Hezbollah's weapons capabilities would benefit the Palestinian resistance.
Hezbollah chief Sayyed Hassan Nasrallah on Thursday said his movement had sent the reconnaissance drone shot down over Israel last weekend.
The Gaza-based Al-Mujahideen Brigades described Hezbollah's operation as "unprecedented" and said it proved that resistance was the best way to face Israel and to stop its continuous attacks.
The Salah al-din Brigades, the military wing of the Popular Resistance Committees, said Hezbollah's improved capabilities would strengthen the resolve of the Palestinian people and deter Israel from attacking them and their holy places.
The drone also highlighted the weakness of Israel's military and security systems which failed to detect the aircraft's entry into Israeli airspace, the PRC wing said.
The brigades congratulated Hezbollah on its achievement, noting that it had developed the drone despite an international embargo and restrictions on weapons transfers.
In a televised speech, Nasrallah said the drone's parts were manufactured in Iran and assembled by Hezbollah in Lebanon. He said the aircraft had flown over sensitive locations, including Israel's nuclear facilities in Dimona, before it was shot down by Israeli forces.
"The downing of the drone was natural and expected," the Hezbollah secretary-general said. "This capability is only part of the surprises of any future confrontation."
Nasrallah said it was Hezbollah's right to send drones into Israel "whenever it wants" and that it would send more.
He accused Israel of violating Lebanese airspace 20,864 times since the UN Security Council resolution 1701 was passed in 2006 to end the Israeli-Lebanon war. The Lebanese government is unable to prevent the Israeli violations "and the international community is silent," he added.