A suicide bomber driving a tractor blew himself up today in the second attack in three days near Iraq's infamous Abu Ghraib prison.
An attack on Saturday killed one militant and wounded 44 American troops, 13 prisoners and about 50 insurgents, the US military said.
Today’s bombing killed the attacker and injured four civilians, police said.
An Iraqi police official said vehicle exploded near the prison’s gate.
Abu Ghraib was at the centre of a prison abuse scandal last year after photographs became public that showed US soldiers humiliating Iraqi inmates sexually, including having them pile naked in a human pyramid.
The United States is holding 10,500 prisoners in Iraq, nearly 3,500 of them at Abu Ghraib.