In Turkey, a car bomb attack left seven police officers dead and at least 23 other people wounded in the Kurdish-majority southeastern city of Diyarbakir Thursday.
According to Turkish media, the bomb exploded while a vehicle transporting special police forces passed by the city's main bus terminal.
There has been no immediate claim of responsibility for the attack. An offshoot of the Kurdistan Workers' Party (PKK) claimed two car bomb attacks earlier this year in the capital, Ankara.
Twenty-nine people, most of them soldiers, were killed on February 17, when PKK militants targeted their bus. On March 13 an explosion claimed by Kurdish rebels killed 37 people, including two bombers.
A suicide bomb blast in Istanbul on March 19 killed five people and wounded at least 36.