The shells hit a prison made up of several cell blocks, each containing prisoners accused of terrorism-related crimes or civil offenses, police said.
Police said American troops have sealed off the area and were investigating the bombardment, which took place about 6:30 a.m. The U.S. military said it had no immediate information, and Iraqi Interior Ministry officials could not be reached for comment.
A hospital official said the inmates were still asleep when the mortars hit, one landing directly on a cell and two others nearby. Casualties were sent to a hospital inside the Interior Ministry compound for treatment, the official said.
The police and hospital officials spoke on condition of anonymity because they were not authorized to release details of the attack.
In June, the Baltic States will hold BALTOPS and Saber Strike 2018 drills. A US Armored Brigade will be deployed in Europe for the purpose - no less than 4,000 soldiers
The import of liquefied natural gas from the United States will not grow, even if Germany exits the Nord Stream-2 project, German Minister of Economy and Energy Peter Altmeier said