Maj. Gen. Qasem al-Dulaimi tells The Associated Press the attacker drove a booby-trapped vehicle into a joint security checkpoint managed by the Iraqi army and the Popular Mobilization Forces at the southern entrance of the town of al-Qaem, about 30 kilometers (19 miles) from the Syrian border.
Al-Dulaimi says four security forces and two civilians were killed in the blast.
He blamed the Islamic State group for the attack.
Al-Qaem is a former Islamic State group stronghold on Anbar’s border with Syria.