DUBAI (Reuters) - Al Qaeda in Iraq said reports that U.S. forces had killed its leader Abu Musab Al Zarqawi were a lie, according to an Internet statement posted on Wednesday. The group was reacting to remarks by a U.S. official who said on Sunday that U.S. authorities were looking into whether Zarqawi had been killed during fighting in northern Iraq. A White House spokesman later said Zarqawi's death was "highly unlikely." "The media has lately circulated this news that was announced by the Crusaders (U.S. military) about the death of the leader of the group in an armed confrontation...