A Turkish policeman uses tear gas to disperse Kurdish protesters in Istanbul, March 18, 2012.
Turkish police have used water cannon and tear gas against Kurdish protesters in the southeastern city of Diyarbakir.
Clashes broke out between police and protesters in the city on Saturday.
The pro-Kurdish Peace and Democracy Party (BDP) had previously organized a demonstration to be held in Diyarbakir on the same day to demand the release of Abdullah Ocalan, the jailed leader of the Kurdistan Workers Party (PKK).
However, the provincial governor had denied the BDP permission to hold the demonstration.
Meanwhile, Turkish security sources said 12 police officers were injured in a bomb attack carried out by the PKK terrorists in the eastern province of Van.
The PKK launched an armed campaign against Turkey in 1984 in a quest to gain independence for Kurds living in the southeast of the country.