Insurgents in Iraq have again targeted the country's security forces, killing at least 20 police and National Guards in two suicide car bombings.
In the first attack, 16 policemen were killed near a military base west of Baghdad. In the second bombing, four National Guards were killed at a checkpoint south of Samarra.
In Baghdad, a roadside bomb injured six American soldiers.
Meanwhile, the Army of Ansar al-Sunna militant group has posted pictures on its website that are allegedly of the beheading of an Iraqi man it accused of being a spy for U.S. forces in Mosul.
The violence came as the U.S. military said a senior member of Abu Musab al-Zarqawi's terror network was captured during a pre-dawn raid in Fallujah.