The United States has ruled out the prospect of military co-operation with Iran, over the escalating crisis in Iraq.

Remarks by Secretary of State John Kerry, saying “I wouldn’t rule out anything that would be constructive," caused speculation over whether the two countries would work together.

The claimed execution of 1,700 prisoners by the Islamic State of Iraq and Levant (ISIS) in the Iraqi city of Tikrit almost certainly amounts to war crimes, stated the UN High Commissioner for Human Rights Navi Pillay.

Videos and photographs have emerged on various websites linked to ISIS, showing executions of dozens up of members of the Iraqi army. ISIS claims to have executed 1,700 after capturing the city of Tikrit. It comes as the group claim to have made further territorial gains, capturing the town of Tal Afar and its commanding general, whom they will publically execute, according to reports.

Pillay said in a statement earlier today,

“Based on corroborated reports from a number of sources, it appears that hundreds of non-combatant men were summarily executed over the past five days, including surrendered or captured soldiers, military conscripts, police and others associated with the Government,”

The High Commissioner went on to add,

“Although the numbers cannot be verified yet, this apparently systematic series of cold-blooded executions, mostly conducted in various locations in the Tikrit area, almost certainly amounts to war crimes”.

UN High Commissioner Navi Pillay has warned of war crimes occurring in Iraq, as militant group Islamic State of Iraq and the Levant (ISIS) released images of the shooting of dozens of captured Iraqi soldiers.

A Ukraininan military plane was shot down by Pro-Russian separatists, killing all 49 crew and troops aboard.

Ukraine's president Petro Poroshenko has vowed to retaliate, saying that "all those involved in cynical acts of terrorism of this magnitude must be punished."

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.

Tens of thousands of Cambodian migrants have left Thailand, where there are fears that the military government may crack down on illegal workers, with reports of forced deportations emerging.

“President Obama met with his senior foreign policy team yesterday afternoon. We had a comprehensive meeting regarding the events in Iraq. We discussed a range of options including military action.”

The Police Service of Northern Ireland has announced it will treat the loyalist union flags in mixed area in Belfast as a breach of peace.

In a statement to the BBC, the PSNI said that tensions were ‘particularly heightened’ in Ballynafeigh, south Belfast, by the erection of British flags.

"As a result, police have directed that any future erection of flags on this part of the Ormeau Road will be treated as a breach of the peace. Community representatives have been spoken to and advised of this," the statement said.

Sinn Féin assembly member Alex Maskey, who led discussions with the PSNI, said that the police brought themselves into disrepute, as they watched the flags being put up.

"Police officers did see and did stand by when people were putting flags up and I certainly don't want to see that repeated again because the PSNI themselves have brought themselves into disrepute because of their behaviour around the flags.