Tehran museum unveils western art masterpieces hidden for decades

Deviant' works by artists including Picasso and Warhol return to display at exhibition in Iranian capital

Some of the world's most prized works of contemporary western art have been unveiled for the first time in decades - in Tehran.

The Iranian president Ebrahim Raisi, a hardline cleric, rails against the influence of the west. Authorities have condemned deviant" artists for attacking Iran's revolutionary culture". And the Islamic Republic has plunged further into confrontation with the US and Europe as it rapidly accelerates its nuclear programme and diplomatic efforts stall.