Afghanistan has executed 15prisoners by gunfire at its main prison outside Kabul, the country's first executions in more than three years, the chief of prisons said Monday, AP reported. The mass execution took place Sunday evening according to Afghan law, which calls for condemned prisoners to be shot to death, said Abdul Salam Ismat. The killings are the country's first state-sanctioned executions since April 2004. Amnesty International said after the 2004 execution that President Hamid Karzai had assured the group he would institute a moratorium on the death penalty.