Mosul, Iraq,– Suicide bombers struck a police headquarters, an army base and a hospital around Mosul on Sunday, killing 33 people in a setback to efforts to rebuild the northwestern city”s police force that was riven by intimidation from insurgents seven months ago.

At least 14 people were killed in attacks elsewhere in Iraq, including a U.S. soldier whose convoy was hit by a roadside bomb in Baghdad and six Iraqi soldiers who were gunned down outside their base north of the capital.

Defense Secretary Donald H. Rumsfeld, meanwhile, said it may take as long as 12 years to defeat the insurgents.

The Associated Press quoted Rumsfeld as saying that Iraq”s security forces will have to finish the job because American and foreign troops will have left the country by then.