Serb news reports say a powerful explosion has blown up a police jeep in the country's tense south bordering Kosovo. No one was injured. Local media quoted police as saying a blast occurred late Friday outside the police headquarters in Bujanovac, about 200 kilometers south of Belgrade. Witnesses said the explosion also damaged nearby buildings and cars. Beta news agency reported that a special police team examined the scene Saturday. There was no immediate indication who was behind the explosion.