The United States has announced it is sending an aircraft carrier into the Gulf, to increase its options to deal with the conflict in Iraq.
The USS George HW Bush, capable of carrying dozens of fighter jets, was ordered into the Gulf by Defence Secretary Chuck Hagel, alongside a guided-missile cruiser and a destroyer.
With ISIS advancing closer to the Iraqi capital, Iran has said it did not rule out working with the US in fighting the militants.
"We can think about it if we see America starts confronting the terrorist groups in Iraq or elsewhere." President Rouhani said according to the BBC.