RIYADH: A gunman killed two staff at a private school in the Saudi Arabian capital yesterday, a security source said. “A teacher took a gun and then he went to the school room and he killed the assistant school principal and one of the employees,” said the source who asked not to be identified because a formal statement would come later from Riyadh police. Police are treating the case as a criminal matter and “not a terrorist incident,” the source said. According to his latest information the suspect, of Iraqi origin, was still being sought. The shooting occurred at Kingdom School, which is part of a group owned by Prince Alwaleed Bin Talal, chairman of Kingdom Holding Co whose diversified investments include Citigroup and Time Warner. There were no students present at the time of the shooting, according to the United States embassy which issued an alert about the case.