Construction work has intensified on a major new structure at a facility key to Israel's long-suspected atomic weapons programme, according to satellite images analyzed by experts.
They say it could be a new reactor or a facility to assemble nuclear arms — but secrecy shrouding the programme makes it difficult to know for sure.
The work at the Shimon Peres Negev Nuclear Research Center near the city of Dimona will renew questions about Israel's widely believed status as the Mideast's only nuclear-armed state.
It could also draw international criticism, especially since it comes after Israel and the United States bombed nuclear sites across Iran in June over their fears that the Islamic Republic could use its enrichment facilities to pursue an atomic weapon. Among the sites attacked was Iran's heavy water reactor at Arak.
Seven experts who examined the images all said they believed the construction was related to Israel's long-suspected nuclear weapons program, given its proximity to the reactor at Dimona, where no civilian power plant exists. However, they split on what the new construction could be.
Three said the location and size of the area under construction and the fact that it appeared to have multiple floors meant the most likely explanation for the work was the construction of a new heavy water reactor. Such reactors can produce plutonium and another material key to nuclear weapons.
The other four acknowledged it could be a heavy water reactor but also suggested the work could be related to a new facility for assembling nuclear weapons. They declined to be definitive given the construction was still in an early stage.
"It's probably a reactor - that judgement is circumstantial but that's the nature of these things," said Jeffrey Lewis, an expert at the James Martin Center for Nonproliferation Studies at the Middlebury Institute of International Studies, who based his assessment on the images and Dimona's history. "It's very hard to imagine it is anything else."
Israel does not confirm or deny having atomic weapons, and its government did not respond to requests for comment. The White House, which is Israel's staunchest ally, also did not respond to requests for comment.
The Associated Press first reported on excavations at the facility, some 90 kilometers (55 miles) south of Jerusalem, in 2021. Then, satellite images only showed workers digging a hole some 150 meters (165 yards) long and 60 meters (65 yards) wide near the site's original heavy water reactor.
Images taken July 5 by Planet Labs PBC show intensified construction at the site of the dig. Thick concrete retaining walls seem to be laid at the site, which appears to have multiple floors underground. Cranes loom overhead.
Associated Press