New satellite imagery shows significant renewed activity at Iran’s Minzadai complex, a secretive site northeast of Tehran that Israel says was used to develop capabilities required for a nuclear weapon.

Approximately six months after Israel struck the facility, vehicles, trucks and personnel appear to have returned to the compound, while excavation work is continuing in an area damaged during the attack.

The renewed activity is raising concerns that Tehran may be attempting to restore capabilities destroyed by Israel.

Israel struck Minzadai on March 3, 2026. According to the IDF, intelligence showed that a group of Iranian scientists had been secretly working at the site on technologies required for the development of nuclear weapons.

The Institute for Science and International Security, which has analyzed new satellite imagery from September and October, says extensive activity has now resumed following months of debris removal and cleanup.

Numerous cars were visible in a parking area outside the secured compound between early September and early October, while passenger vehicles and trucks were observed inside the facility.

Earth-moving work is also continuing in an area hit during the Israeli strike.

That work is taking place around a surface designed to resemble a plaza where several impact craters were identified following the attack. Researchers previously raised the possibility that the area is connected to infrastructure located at least partially underground.

Satellite imagery alone, however, cannot establish the full extent or purpose of any underground facilities.

Researchers cautioned that the presence of vehicles and construction activity does not by itself prove that Iran has resumed work on nuclear weapons at Minzadai.

However, given what is known about the site, the institute assesses that the activity could represent an Iranian effort to rebuild capabilities connected to nuclear weapons development that were lost in the Israeli attack.

The IDF has previously said intelligence uncovered a covert Iranian program involving senior nuclear scientists working along multiple tracks to advance technologies necessary for developing a nuclear weapon.

The Institute for Science and International Security has assessed that Minzadai was likely connected to SPND, the Iranian organization associated with research and development related to nuclear weapons.

Researchers have also raised the possibility that metallurgical work relevant to manufacturing nuclear weapon components was carried out there, though that assessment has not been confirmed by the IDF.

Satellite imagery following the March strike showed extensive destruction at the compound, including several above-ground structures and damage in an area believed to contain underground infrastructure.

Signs of activity at Iranian nuclear-related sites began emerging in subsequent months, as Tehran started clearing debris and carrying out work at facilities damaged in Israeli strikes.

Now, roughly six months after the Minzadai attack, the debris has largely been removed, vehicles have returned and work is continuing in damaged portions of the complex.

(YWN Israel Desk — Jerusalem)