Armed fighters in Iraq have killed nine people including six soldiers in a series of attacks across the country. Armed assailants killed four soldiers at the al-Siniya base west of the northern oil refinery town of Baiji on Saturday, said Iraqi army captain Toufik Khalaf. In a separate incident, two soldiers were killed when armed men attacked an Iraqi army checkpoint in al-Dhuluiyah, 70km north of Baghdad. An Iraqi translator for US forces was also shot dead on Saturday while in front of his house in al-Sharquat, 300km north of the capital. Meanwhile, a worker from the Dura refinery was gunned down in his car. Meanwhile, an Iraqi group calling itself the Islamic Resistance Movement Twentieth Revolution Brigades says it has downed a US spy drone in the Abu Ghraib district, west of Baghdad. The group posted a video on the internet showing armed men firing a missile and then pieces of wreckage said to be parts of the drone. The authenticity of the tape could not be verified by an independent source.