Police believe an explosive device was planted under or near the truck.
Nobody was injured in the pre-dawn blast, according to a NATO spokesman. There has been some anti-NATO sentiment in Macedonia, which has served as the staging ground for tens of thousands of alliance troops in the peacekeeping operation in Kosovo. Many of Macedonians sympathized with the Serbs during NATO's 78-day bombing campaign against Yugoslavia, and tensions also have run high between Macedonia's Slavs and the ethnic Albanian minority, especially with the arrival of hundreds of thousands of Kosovo Albanian refugees in recent months. As Serbs continued to flee Kosovo, the leader of the Serbian Orthodox Church visited the province and joined peacekeepers in pleading with his fellow Serbs to stay in what they consider the cradle of their culture. But a Serbian police general has reportedly been urging thousands of Serbs in one town to leave.