Iran and European powers held talks in Istanbul about Tehran’s nuclear negotiations with Washington, as US President Donald Trump warned “something bad” will happen if the Islamic republic does not quickly decide on a US proposal for a deal.

The three European powers have been weighing whether to ... Gharibabadi said after Friday's meeting that "Iran and the three European countries are determined to sustain and make optimal use ...

Diplomats from Iran and three European countries discussed their now-moribund 2015 nuclear deal in Istanbul on Friday, Iran's deputy foreign minister said, without giving details of any progress made.

Lebanese Al-Mayadeen TV correspondent in Turkey reported on Friday that negotiations between Iran and the European troika (three major European powers namely Germany, France and the United Kingdom) began in the Turkish city of Istanbul on Friday. The meeting was being held at Tehran's consulate in Istanbul.

PARIS (Reuters) - Iran's foreign minister warned Britain, France and Germany on Monday that a decision to trigger a U.N. mechanism reimposing sanctions on Tehran could lead to an irreversible escalation of tensions.

Friday's meeting with the European powers comes less than a week after a fourth round of Iran-US nuclear talks, which Tehran called 'difficult but useful.'