Elaborate security arrangements have been made countrywide today as scores of mourners take out Muharram 10 processions in observance of Yaum-i-Ashura. Yaum-i-Ashura is observed every year with mourning processions and religious gatherings to commemorate the martyrdom of Imam Husain (RA) and his companions in the Battle of Karbala in 680AD. The central procession in Karachi departed from Nishtar Park at around 9:30am.