"The Zionist claims about the illness of Sayyed Hassan Nasrallah, Hizbullah's secretary-general, and his suffering of a heart attack are the grand lie of the new year", Hossein Amir Abdullahian, the worldwide affairs adviser to the Iranian parliament speaker, tweeted.
Coupled with the announcement that after Sunday's discovery, Israel was wrapping up its operation to destroy Hezbollah's tunnel network into Israel, the weekend strike in Syria is widely seen as Eisenkot's "parting shot" as his four-year tenure as military chief ends.
The news comes amid the conclusion of the Israel Defence Forces' (IDF) Operation Northern Shield, aimed at demolishing secret tunnelsdug that were by Hezbollah from Lebanon to Israel.
It reached a few dozen metres into Israel, and at 55 metres under the ground was the deepest as well as "the longest and most detailed" of all the tunnels the army exposed, Conricus said. "We will continue to monitor all activity by Hezbollah, and by Iran and its proxies".
Lt Gen Conricus said the latest tunnel originated from the Lebanese border town of Ramyeh.
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He claimed the tunnel included stairs, a rail system, and a passageway to allow equipment and forces through. According to Al-Hadath TV channel, the Israeli planes attacked Iranian military warehouses near the airport, which are used by the Hezbollah militias, fighting on the side of the government's army.
"We have achieved the goal (to expose and destroy the tunnels from Lebanon) which we set out to achieve at the beginning", Conricus said.
Hezbollah and Israel last fought a war in 2006.
UNIFIL, the United Nations peacekeeping force in Lebanon, was informed of the latest tunnel, Conricus said.
Hezbollah has not commented on the tunnels, the existence of several of which has been confirmed by Unifil peacekeepers.