Iran builds underground nuclear facility amid US tensions

Construction at Iran’s Fordo nuclear facility (Maxar Technologies/AP)

Iran has begun construction on a site at its underground nuclear facility at Fordo amid tensions with the US over its atomic programme, new satellite photos show.

Iran has not publicly acknowledged any new construction at Fordo, whose discovery by the west in 2009 came in an earlier round of brinkmanship before world powers struck the 2015 nuclear deal with Tehran.