On 4 July 2003, 53 Hazara Shias were killed and at least 65 others were injured when the mosque was attacked during the Friday prayer in Quetta, Balochistan, Pakistan. When hundreds of worshipers were offering Friday prayer, three armed men entered the Asna Ashari Hazara Imambargah and started shooting, threw hand grenades and one suicide bomber blew himself up - which left 53 dead and tens of others injured. It was second major sectarian attack on Quetta's Hazaras after the massacre of police cadets. It was the start of the series of killings of Hazaras in Quetta.