US President Donald Trump has repeatedly threatened to bomb a suspected underground nuclear site in Iran known as Pickaxe Mountain, where recent satellite images appear to show construction work taking place. Pickaxe Mountain is one of the few Iranian sites linked to the country's nuclear programme that has not been the target of US and Israeli strikes. And on 28 July he said: "I know exactly what's going on at Pickaxe. It's not a big problem - we took out their nuclear sites, and we'll have to take out Pickaxe if we don't make a deal." Iran's foreign ministry spokesperson Esmail Baghaei said on 22 July that "no nuclear activity is taking place" at Pickaxe Mountain, and described US threats as "a fabricated pretext for aggression, destruction, and sabotage".