Three citizens have been killed and another was injured in an explosive charge blast planted under their vehicle in southwest of Iraq\'\'s Kirkuk on Monday. Two further explosive charges blew up, causing material damage, Kirkuk\'\'s Police Director reported. \"An explosive charge blew up this morning, aimed at a civilian car close to Qazan village of al-Riyadh township, 45 km to the southwest of Kirkuk, killing three civilian and wounding another, along with causing damage to their vehicle,\" Lt-Brigadier, Sarhad Qader told (Aswat al-Iraq) news agency. Qader said that the victims and the wounded person were driven to a Kirkuk hospital, whilst investigation began about the incident. In another incident, Qader said that to explosive charges blew up on Monday close to Dibbis township, 40 km to the west of Kirkuk against an Iraqi Army\'\'s checkpoint, causing minor material damage for one of the Army\'\'s vehicles. Kirkuk is 280 km to the northeast of Baghdad.