The US blacklisted 19 companies and firms linked to Iran's nuclear program. Iran said the move could jeopardize the interim nuclear deal agreed to in Geneva.
Talks in Istanbul today over Iran's nuclear program and sanctions that have crippled its economy yielded little in the way of progress.
Ahmadinejad charges? The dispute appears to stem from an ongoing confrontation between Ahmadinejad and the ruling clerics in Iran following years of tensions over power struggles.
Meeting in Washington, Secretary of State John Kerry and EU foreign-policy chief Catherine Ashton underscore their preference for a diplomatic solution to the Iran nuclear program.