Sunni v Shia

The Islamic State of Iraq and al-Sham’s (Isis) advance through Iraq brings with it the fear of human rights atrocities against civilians, including execution, torture and rape.

A British man fighting with Isis in Syria has conducted a lengthy interview with two freelance American journalists for an internet podcast in which he explains why he is fighting for a “caliphate”.

Grinning from ear to ear, Syrian extremist rebel commander Abu Omar al-Shishani climbs out of a US-made Humvee – freshly delivered from Iraq where his extremist group is making gains.

Maajid Nawaz “exercised his freedom of speech in expressing a minority Muslim view” and the Liberal Democrats “defend his right to do that”, Lord Ashdown tells Channel 4 News.

Iraq is descending into yet another bloody conflict. Thousands have fled the city of Fallujah, which is now held by militants. So what next for this blood-stained state? Lindsey Hilsum explains.

Iraq’s prime minister calls on tribal leaders in Anbar province to expel al-Qaeda linked fighters who have taken over key towns and cities in the region.

The resort is the playground of Russia’s elite, and in February hosts the Winter Olympics. But Sochi sits on one of the global flashpoints for Islamist terror. Who threatens the games – and why?

Responding to the bombing outside Iran’s embassy in Beirut, former foreign secretary David Miliband tells Channel 4 News: “We have seen the overt export of the Syrian civil war into Lebanon.”

A wave of co-ordinated car bomb detonations in Shia areas of Baghdad and a suicide bomb attack against soldiers kills 56, officials say.

A wave of car bomb attacks kill dozens in Baghdad on Monday morning, the latest violence in a campaign against Iraq’s Shi’ite minority.

At least 169 people, including women and children, were killed in a massacre in the Syrian town of al-Bayda earlier this year. Warning: this exclusive video contains extremely distressing footage.

As Syria’s war becomes a focus for religious extremism, Krishnan Guru-Murthy speaks to Douglas Murray, a critic of Islamic fundamentalism, about the beliefs surrounding the country’s significance.