The close aide of Ayatollah Ali Khamenei branded the attacks “acts of stupidity”.
He claimed his country will continue supplying proxies with high-precision missiles, according to Ynetnews.
Mr Shamkhani added that the slow discovery of Hezbollah tunnels brings “shame” on Israel’s “intelligence capabilities”.
The Israeli military is attempting to expose and destroy Hezbollah terror tunnels along its border with Lebanon.
He also referred to former Israeli minister, Gonen Segev, who was found guilty of spying for Iran and will serve 11 years in prison.
The top Ayatollah ally said: “There is no greater shame to the Zionist entity, which claims to have superior intelligence capabilities, than the fact that tunnels – hundreds of kilometres long – had been dug under this entity’s nose, and the fact that one of their ministers turned into an Iranian spy.”
He added: “Iran has no scientific or operational restriction for increasing the range of its military missiles, but based on a defensive doctrine, it is continuously working on increasing the precision of the missiles.”
READ MORE: Iran hits back at ballistic missile warning from US – WW3 threat
His comments come after a massive air attack on Iranian targets in Syria last week.
The bombardment was in response to the surface-to-surface rocket launched at Israeli territory by Iranian Quds Force.
Mr Shamkhani made the bold statement at the National Conference on Space Technologies.
He said the accuracy of missiles is working to be improved upon, but there were no plans to increase range.
In 2015, the Iran signed a nuclear deal that restricts their right to develop nuclear weapons.
The UN Security Council resolution pinned to it asked Tehran to stop working on ballistic missiles designed to deliver nuclear weapons for up to eight years.
However, Iran said the call was not binding and denied that its missiles are capable of carrying nuclear warheads.
The US also instructed that Iran should stop developing satellite-launching technology amid fears it could be used for nuclear weapons.