The mayors of two districts in southeastern Diyarbakır province have been taken into custody over alleged "autonomy" claims, police said on Wednesday.

Seven people, including Sur Co-Mayor Seyid Narin, and Silvan Co-Mayor Yüksel Bodakçı were detained in an early morning operation, police said.

The operation followed an investigation launched by Diyarbakir's Chief Public Prosecutor's Office after Narin and Bodakçı reportedly declared "self-rule", police added.

Police are also looking for four more suspects.