Police said the attacker was stopped at the gate of the imambargah but exploded himself after opening fire, according to PTI reports. The powerful blast was heard from far away, with TV footage showing bodies, shattered glass and debris inside the mosque complex.
Police, Rescue 1122 personnel, army troops and Rangers launched rescue and security operations, cordoning off the area. An emergency was declared at hospitals across the capital, including PIMS, to treat the injured. Authorities said the explosion appeared to be a suicide attack and investigations are underway.