Israeli Prime Minister Benjamin Netanyahu confirmed on Monday that Israel’s attack on Iran last month hit a nuclear facility, undermining Tehran’s defense capabilities and missile production.

“It’s not a secret,” Netanyahu said in a speech to parliament. “There is a specific component to their nuclear program that was hit in this attack.”

However, Netanyahu added that Iran’s path to a nuclear weapon had not been blocked.

It is noted that a report by Axios reported that the attack caused significant damage to the site at the Parchin military complex, about 20 kilometers southeast of Tehran.

A former Israeli official said the Israeli airstrike destroyed sophisticated equipment used to design the plastic explosives that surround the uranium in a nuclear device and are necessary to detonate it.

The facility was reportedly part of Iran’s Amad nuclear weapons program until 2003. It was then used to test explosives needed to detonate a nuclear device, the report cited the Institute for Science and International Security as saying.