Explosion at US Base in Mosul

Multiple casualties being reported. Atrios posts that CNN says 22 killed. Developing. UPDATE: Reuters: The Pentagon says 22 people have killed in a blast at a U.S. military base in the northern Iraqi city of Mosul, CNN has reported. UPDATE: (Reuters) - At least 22 people were killed and 50 others wounded in a rocket and mortar attack against a U.S. military base in the northern Iraqi city of Mosul, a defense official at the Pentagon said on Tuesday. UPDATE: AP - The Ansar al-Sunnah Army claimed responsibility for the attack in a statement on the Internet. It said the attack was a "martyrdom operation" targeting a mess hall in the al-Ghizlani camp. Most reports claim that the dining hall came under rocket or mortar attack, so it's unclear how this was a "martyrdom" operation.