DIYARBAKIR, Turkey - Turkish security forces killed 11 Kurdish insurgents in clashes near the borders with Syria and Iraq, while one soldier was killed in a firefight elsewhere in southeast Turkey, state authorities said on Friday. Violence has wracked the mainly Kurdish region since a two-year Kurdistan Workers Party (PKK) ceasefire broke down in July, leaving hundreds dead and tearing apart a peace process launched by Ankara with the group's jailed leader in late 2012. President Tayyip Erdogan has vowed to fight the PKK until all of its fighters are 'liquidated.'