Inmates at the largest US-run prison in Iraq rioted in protest at the transfer of detainees to another compound at Camp Bucca in southern Iraq last week.
Four prison guards and 12 prisoners were wounded before the riot was brought under control.
"During the disturbance, the detainees chanted, threw rocks and set several of their tents on fire," a US army statement said.
Last month, prison guards foiled a jailbreak by finding two tunnels dug under the ground at Camp Bucca. One of the tunnels had cleared the perimeter fence of the prison.
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In January, US guards shot dead four inmates at Camp Bucca during a riot.