A six member team of FIA went to the scene of blast at Jinnah Hospital to look at evidence and clues. According to the FIA sources, the nature of the explosive device is similar to the one that was used during the Karachi Ashura blast on December 28. According to sources, a mobile phone was used as time device in the explosion. The FIA team gathered parts of the motorcycle and ball bearings from the scene. The FIA team believes that a mobile phone found at the scene of the blast was used in the explosion. Interior Minister Sindh Zulfikar Mirza described the blast at Karachi as national tragedy.