At least six civilians and six militants were killed on Monday in a suicide attack in Iraq, the Interior Ministry said.The attack was carried out by six militants in the town of Ain al-Tamr, ministry spokesman Colonel Saad Maan said in a statement.Iraqi security forces killed five militants, while the sixth reportedly went into a residential building and detonated the explosive device he was wearing, killing six people and injuring another six.Ain al-Tamr was the scene of a similar attack on a wedding party in August, which resulted in the deaths of 18 people.