The 2009 Karachi bombing or Ashura attack took place on 28 December 2009 inside a Shi'ite procession commemorating the day of Ashura, at Muhammad Ali Jinnah Road, Karachi. Ashura is the holiest of days for followers of Shia Islam and marks the anniversary of the death of Hussain, grandson of the Islamic prophet Muhammad, who was killed at the battle of Karbala in 680. At least 30 people were initially reported to have been killed, later figures revealed even more deaths while dozens were left injured in the wake of the attack. The attacker marched amongst the procession with tens of thousands of people attending the march. There is some speculation amongst officials as to whether the nature of the blast was that of a suicide attack or a remotely detonated or planted bomb.