Turkey on Sunday slapped a curfew on two border towns in the Kurdish-dominated south-east ahead of a looming military "clean-up" operation as it eased a lockdown in Diyarbakir. Turkish troops have been waging a major - and controversial - offensive against the outlawed Kurdistan Workers' Party (PKK) since December, imposing strict 24-hour curfews in a number of towns and cities in the south-east.