According to the website of the Astan, an integrated plan has been underway for ensuring security and arranging the necessary services for the pilgrims.
Every year a large number of pilgrims converge on the holy city of Karbala on the day of Arbaeen.
In the past two years, the number was estimated to be more than 20 million.
Arbaeen marks the anniversary of the 40th day after the martyrdom of Imam Hussein (AS) and his companions in the Battle of Karbala in the year 61 after Hijra (680 AD).
On this day, Shia Muslims all over the world mourn the martyrdom of Imam Hussein (AS) and his companions.
This year, Arbaeen falls on Wednesday, December 2.
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