ISLAMABAD (APP) - President Asif Ali Zardari has strongly condemned the killing of Raza Haider, MQM leader and Member Sindh Assembly, who was shot dead by unknown assailants in Karachi on Monday evening. The President in a message expressed his shock and grief over the unfortunate incident and directed the concerned authorities to investigate the tragic happening and take all necessary steps to bring the culprits to justice. The President also conveyed his condolences to the bereaved family and prayed to Almighty Allah to rest the departed soul in eternal peace and grant courage to the bereaved family to bear this irreparable loss with equanimity. Meanwhile, Interior Minister Rehman Malik accused banned outfit, Sipah-e-Sihaba Pakistan for the assassination MQM PMA Raza Haider, who was gunned down in Karachi along with a police constable on Monday. Talking to mediamen at Parliament House, Rehman Malik said there were reports of threat to the life of Raza Haider, which were conveyed to certain high offices. We also report that Sipah-e-Sahaba had issued him (Haider) threats . He said the way Sipah-e-Sahaba was targeting Shias elsewhere in the country lent credence to its involvement in this heinous crime. He said he was saddened to learn about this tragic incident, and had talked to ANP leader Asfan-dyar Wali, who had also condemned it. Rehman Malik said the perpetrators of this act wanted to destablise Karachi, which amounted to destability the rest of the country. He appealed to MQM not to be trapped by those elements, who did not want to see peace in Karachi, assuring we shall definitely apprehend the killers. He also asked MQM leader Altaf Hussain to appeal to his party workers to stay calm. The minister said the elements behind this incident wanted to create rifts between ANP and MQM. Later, commenting on the visit by President Asif Ali Zardari to the UK, Rehman Malik said it was in the interest of the country should he go there. The President has always accorded top priority to the interest of nation and country. He said the leadership of UK and USA had said that the statement of British Prime Minister was not appropriate. The minister said there might be some misunderstanding which would be removed when President Zardari and British Prime Minister would talk to each other.