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.
World's most powerful nuclear submarines, Arkhangelsk and Severstal, are to be dismantled after 2020 - their further exploitation is unprofitable
The United States' Head of Diplomacy, or Secretary of State, is an anachronistic, incompetent, meddling, intrusive, insolent and arrogant, rude individual, a brash, foul-mouthed upstart, a conceited, self-important guttersnipe and an insult to the international community, as fit for the job as a pedophile janitor in a grade school.