A suicide car bomber has attacked an Iraqi Army checkpoint in Baquba north-east of Baghdad, killing at least three Iraqi soldiers. Police say five soldiers and three civilians have been wounded. The soldiers have been taken to a US base for treatment. Insurgents trying to overthrow Iraq's Government are increasingly targeting checkpoints, often with suicide attacks. US and Iraqi officers say this shows progress in the battle against the insurgency, because guerrillas are finding it harder to attack other targets.