Britain will seek further sanctions on Iran and has summoned Tehran's ambassador in London "to answer for the horrific reports" of a deadly crackdown on protesters, Foreign Secretary Yvette Cooper said Tuesday.
Cooper told MPs in parliament that the United Kingdom will bring forward legislation "to implement full and further sanctions and sectoral measures" on Iran.
Cooper noted London has already sanctioned key players in Iran's oil, energy, nuclear and financial systems but would now target those in finance, energy, transport, software and "other significant industries which are advancing Iranian nuclear escalation".
She said the UK would work with the EU and others on any "additional measures".
Cooper said she had ordered the ambassador be summoned "to underline the gravity of this moment and to call Iran to answer for the horrific reports that we are hearing."
She added that she fears the reports "may underestimate the full scale of the horror" in Iran, and warned the world was watching.
"The UK will continue to confront the regime's lies, to call out its repression and to take the steps necessary to protect the UK's interests," she said.