Muslims head to Iraq’s Karbala to commemorate Arba’een- Photos

Muslim pilgrims continue their march on the Iraqi holy city of Karbala to commemorate Arba’een, the 40th day after the martyrdom anniversary of Imam Hussein, the third Ahlul Bait Imam.

Arba’een, an annual Islamic pilgrimage, is known as the world’s largest public gathering.

Here is a selection of pictures from the mass march: