Israel has struck Iranian, Hezbollah and Syrian targets in the neighbouring state on dozens of occasions, although Tel Aviv rarely admits openly to carryout out specific attacks.
"The accumulation of recent attacks shows that we're more determined than ever to act against Iran in Syria, just as we promised".
Uncharacteristically, outgoing military chief of staff Gadi syria also spoke publicly of Syrian airstrikes in interviews in recent days.
We worked with impressive success to block Iran's military entrenchment in Syria.
The IDF also said that the "operation stripped from Hezbollah the unique offensive ability that it had built for years as part of an attack plan into Israeli territory that it wanted to conduct to create emergency situations".
He said this entailed "hundreds" of attacks over the past several years of Syria's civil war, in which Iran and Hezbollah have backed Damascus against rebels and Islamist insurgents.
It included stairs, a rail system and a wide a passageway that allowed for the movement of equipment and a large number of forces.
"According to our assessments, there are no longer any tunnels crossing into Israel", military spokesman Lieutenant-Colonel Jonathan Conricus said.
"We have achieved the goal that we set out to achieve", he said.
UNIFIL, the United Nations peacekeeping force in Lebanon, was informed of the latest tunnel, Conricus said. He added that Hezbollah retained underground facilities on the Lebanese side.
Neither Lebanon nor Hezbollah has commented directly on the end of the operation.
In the wake of its discoveries, Israel has asked the worldwide community to impose tough sanctions on Hezbollah and begin to act against its state-within-a-state operation in Lebanon.
Israel has long called for a crackdown on the Iran-backed Hezbollah, a heavily armed mini-army that is believed to possess an arsenal of some 150,000 rockets that can reach almost all of Israel.
Israel has pledged to prevent Iran from entrenching itself militarily in Syria, where it is backing President Bashar al-Assad's regime alongside Russian Federation and Hezbollah.