A police officer said on Tuesday that the assailants -- some wearing military uniforms -- also damaged computers and office furniture. They used baton and knives, but not their pistols.
The officer added that an investigation was under way into the Monday attack. A health official confirmed that five people were hurt. Both officials spoke on condition of anonymity because they were not authorized to talk to the media.
Iraq is ranked among the most dangerous places in the world for journalists, according to the New York-based Committee to Protect Journalists. Hundreds of journalists were killed in the country since the 2003 U.S.-led invasion that toppled Saddam Hussein.
Copyright 2013 The Associated Press.