PPP Co-chairman Asif Ali Zardari has rejected the involvement of Scotland Yard in the investigation into Benazir Bhutto’s killing, and demanded that a UN Commission probe the matter. “Why the government did not seek Scotland Yard’s help when Benazir had called for it after the October 18 blasts in Karachi?” Zardai told a press conference after a joint meeting of the party’s CEC and federal council on Wednesday. “Had the govt called the Scotland Yard team at that time, the tragedy would not have occurred,” he said.