At least eight persons were killed in a suicide attack on a government power station in northern Iraq on Saturday, a security official said.The attack occurred in the morning when seven suicide bombers wearing explosive belts stormed al-Jalsiyah power plant in the southern part of the city of Samarra, around 125 km north of the capital. At least 10 people were injured in the attack, Efe news reported.The deceased included six workers at the power plant and two members of the security forces.During the clashes, security forces killed the seven attackers, who were wearing explosive belts. The forces later took control of the power plant.No group claimed responsibility for the attack. It came a few days after Iraqi Prime Minister Haider al-Abadi declared full liberation of the city of Tal Afar and surrounding areas from IS militants.