In a statement issued from London he has expressed his deep sorrow and grief over the loss of precious human lives and injuries caused to people, dead and the injured.
He has termed the incident a cowardly act and said those killing innocent people and security forces personnel do not deserved to be called Muslims and human beings.
Altaf Hussain also offered his heartfelt condolences with the bereaved families and prayed to Allah to give them strength to bear the loss.
He also prayed early recovery of the injured persons.