An American soldier was killed and 12 wounded in a rocket attack Sunday on an Army base in central Iraq, the U.S. military said.

The rocket landed inside a logistics support base of the 4th Infantry Division (search) in Balad (search), 50 miles south of the division's headquarters in Tikrit (search), an Army statement said.

It said two of the injured soldiers were in serious condition. After the attack, troops detained 16 people including four women for questioning, the statement said.

Tikrit, the hometown of Saddam Hussein (search), is part of the Sunni Triangle (search), where most of the anti-U.S. insurgency has taken place.

The death raised to 523 the number of U.S. soldiers killed in the conflict in Iraq.