40 images go on display at Tehran exhibit to throw spotlight on seizure of Islamic Republic's 'Grace 1,' denounced by supreme leader as UK 'piracy'

Ship leader claims UK forces boarded Grace 1 and made his unarmed crew kneel on deck at gunpoint; London says its troops acted in compliance with international norms

Request comes after London ordered navy to escort its ships through world's busiest oil shipping lane in response to Iranian soldiers seizing British tanker

Newly released radio communications show Revolutionary Guards warning British sailors on HMS Montrose not to put their 'life in danger' by interfering in capture of Stena Impero

London dispatches warship to Gulf to escort UK-flagged tankers across world's busiest oil shipping lane amid escalating tensions

At Vienna summit, deputy FM tells remaining signatories of ailing 2015 pact they 'must not create any obstacles' to Tehran's oil exports

Iranian president offers 'proportional response' if Britain releases seized tanker suspected of busting sanctions

Warship shadows BW Elm as it crosses Strait of Hormuz, in first since Tehran took a UK-flagged tanker last week amid soaring tensions

FM Zarif congratulates former counterpart Boris Johnson, says Islamic Republic not backing down from standoff in oil-rich Gulf

Head of navy says drones tracking all 'enemy' vessels in the region, announces joint naval exercises with 'allied countries' in March 2020