An official Iraqi investigation into a deadly shooting involving Blackwater USA security guards has raised the number of Iraqis killed to 17. It also found the gunfire was unwarranted and amounted to a deliberate crime. It recommends those involved face trial. The Blackwater guards are accused of opening fire on Iraqi civilians in a main square in Baghdad last month. The guards have said they came under fire first. The incident has outraged Iraqis.