At least four people, including three soldiers, were killed in a blast that struck a military truck as it travelled along a road in Turkey's southeastern Tunceli province, according to local officials. Many ambulances were sent to the scene of the blast which happened earlier Tuesday in central Tunceli. An official with the Tunceli governor's office told (CNN) that the office was not yet able to confirm the number of dead or injured. There was no immediate claim of responsibility. However, suspicion within Turkey is likely to fall on Kurdish militants. Tunceli province is a predominantly Kurdish region where frequent clashes have occurred between the Turkish military and fighters from the militant Kurdistan Workers Party, or PKK.