US Defense Secretary Lloyd Austin said on Friday that Iran should question the effectiveness of its weapons systems after its failed attack on Israel earlier this month.

"They should be questioning the effectiveness of their weapons systems and their planning," Austin told reporters.

"Hopefully they don't walk away from this over-confident that they can do this at will, because I think Israel has demonstrated that it has a significant ability to defend itself," Austin added.

In its attack on Israel, Iran launched more than 300 killer drones, cruise missiles, and ballistic missiles on Israeli territory, IDF spokesperson Rear Admiral Daniel Hagari confirmed this weekend.

Contrary to the Islamic Republic’s armed forces chief, who claimed the attack “achieved all its objectives,” the IDF spokesperson reports that 99% of the threats were intercepted by the air defense system, resulting in negligible impact.

"They should learn is that, first of all, their systems don't work as advertised, that they employed a lot of munitions with the intent of creating significant damage in Israel. And none of that worked. So, that should give them pause," Austin added.