On Friday, US President Donald Trump threatened that he may soon order strikes against the site, with the US military currently developing a new bunker-buster munition for the task.

President Trump threatened last week that he 'may hit Pickaxe very soon.' However, experts doubt whether the U.S. has the capabilities to penetrate the underground facility

Analysts reported a surge in construction at Iran's deeply buried Pickaxe Mountain nuclear site as the US explores ways to strike underground facilities.