Hawzah News Agency- The Pakistani pilgrims were headed through Iran to Iraq to attend the Arbaeen commemoration, one of the biggest events of the Shiite calendar which marks the 40th day of mourning for Imam Hussein (PBUH) , the grandson of the Prophet Mohammed.

Last year, some 22 million pilgrims attended the commemoration in the Iraqi shrine city of Karbala, where Imam Hussein and his brother Hazrat Abbas are buried, according to official figures.