A senior US official said the United States and Iran "may have a conversation" about the current crisis in Iraq on the sidelines of this week's nuclear talks.
The two countries are scheduled to meet in Vienna for a fresh round of talks on Iran's nuclear programme today.
The unnamed US official quoted by Reuters news agency said there are "no discussions on possible extension of the nuclear talks deadline."
The Foreign Secretary has been clear on the threat of Isis, but he has ruled out the prospect of any UK military involvement in the crisis.
Iraq’s foreign minister, Hoshyar Zebari, is a natural diplomat. Polite, immaculately dressed, and blessed with a great memory.
Isis has paraded military equipment in Mosul it captured from when the Iraqi army fled in what some see as a "nightmare scenario."