One soldier was killed when Turkish security units clashed with the militant Kurdistan Workers\' Party (PKK) in the mountainous Besta region of ??rnak province on Sunday. The Turkish Armed Forces (TSK) immediately sent more troops to the area after fighting broke out, as well as air support, in Besta in order to capture the militants. The PKK, which is listed as a terrorist organization by Turkey, the EU and the United States, has been waging a bloody war in Turkey\'s southeast since 1984. More than 40,000 people have been killed during the bloody conflict so far. The organization is based in northern Iraq and launches attacks on Turkey from its hideouts in the mountainous region. The PKK also operates in various European cities.