Video said to show burning army vehicles on the road to the Iraqi city of Tikrit, located 95 miles (150 km) north of Baghdad, has been posted on YouTube.
ITV News cannot independently verify this footage
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."