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Mourning processions to mark Chehlum are under way in Karachi on Tuesday amid heavy security after departing Nishtar Park at 1pm, according to the police.

Chehlum, also known as Arbaeen (40 in Arabic), marks the 40th day of mourning for the martyrdom of Imam Husain (AS), the grandson of the Holy Prophet Muhammad (PBUH). It is marked by processions by Shia Muslims across the country.

In another update at 4:50pm, the police said the front of the main procession had reached Eidgah Chowk, while its tail was at Britto Road, en route to Hussainia Iranian Imambargah.

Earlier today, in a press release, the police said MA Jinnah Road would be closed from Guru Mandir to Tower. Traffic police provided alternate routes for commuters travelling through Karachi’s South, Central and East districts.