Prime Minister David Cameron and President Obama agreed that getting vital supplies to Iraq's minority Yazidi community who have been trapped by militants was the immediate priority, as they try to "avert a genocide."
"They agreed that the immediate priority is to get vital supplies to those trapped on Mt Sinjar and the UK will join the US in delivering aid drops," a readout of the call from Number 10 read.
However, both leaders agreed that dropping aid was not a long term solution "and that a way must be found to get these people to safety and to avert a genocide."
The readout added: "They also agreed on the need for the Iraqis to establish an inclusive government as swiftly as possible to unite all Iraqi communities against ISIL terrorists."
Kurdish Peshmerga fighters have emerged victorious in the battle for Mosul Dam, but the question is - what will their next move be?
An ITV News team at Mosul Dam was with victorious Kurdish Peshmerga fighters at the complex earlier today.
ITV News joined a Kurdish unit fighting Islamist militants near Irbil and found them using tanks from the 1950s and short on ammunition.