Turkish authorities detained a key suspect Saturday in a bombing that killed seven people and wounded 23 on Thursday in the strife-torn southeast, security sources said.

Separately, eight members of the security forces were killed Saturday in clashes around the mainly Kurdish region, the sources also reported.

The outlawed Kurdistan Workers Party (PKK) claimed responsibility for Thursday's bombing in the city of Diyarbakir, one day before Prime Minister Ahmet Davutoglu visited the city and outlined plans to confiscate and rebuild a historic neighborhood wrecked in fighting since July.