The ruling regime in Iran are likely to have supported an attack on the UK's embassy in Tehran, the British ambassador to the country has said.
Dominick Chilcott told the BBC Iran was a country in which such action was taken only "with the acquiescence and the support of the state".
Hundreds of protesters attacked the UK embassy in Tehran on Tuesday.
IRAN SHOULD BE ATTACKED IN RETURN - MASSIVELY; OVERWHELMINGLY; BRUTALLY.
WIMPY COUNTER-MEASURES WILL ONLY INVITE WORSE ATTACK BY THEM ON US AND OUR ALLIES.