Hyderabad, July 6: The historic ‘Bibi-ka-Alam’ procession was underway in the old city of Hyderabad amid tight security as solemnity and mourning marked ‘Yaum-e-Ashura’ on Sunday. Thousands of people were participating in the procession, which started from Bibi Ka Alawa in a traditional manner. The procession passes through various parts of the old city before.