The main militant Kurdish group in Turkey says it is ending a unilateral ceasefire declared after the capture of its leader, Abdullah Ocalan, four years ago. A spokeswoman for the group, which has been pressing the government to announce a truce of its own, accused the authorities of failing to grant Kurds greater political and cultural rights. However, she said she did not expect a return to all-out conflict. More than 30,000 people were killed over a 15-year period as the Kurdistan Workers' Party (PKK) fought for autonomy in the overwhelmingly Kurdish south-east. The announcement came as thousands of Kurds staged a demonstration in Diyarbakir - the biggest city in the south-east - to press for more rights and to urge a general amnesty for Kurdish prisoners.