William Hague said Britain might assist Iraqi authorities fighting Islamist militants by offering counter-terrorism expertise.
The Foreign Secretary made the announcements after talks on Iraq with US Secretary of State John Kerry, in London.
"In the UK, we are not planning a British military intervention, but we are looking urgently at other ways to help, for example with counter-terrorism expertise," he said.
"Work is under way on that now and we will continue to liaise closely with our United States allies in particular on that."
He added: "A British team of emergency aid experts from DFID arrived in Iraq early this morning and are looking urgently at what the UK can do on that front."
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."