Turkey's state-run news agency says a former police intelligence chief has been detained as part of an investigation into negligence by officials in the 2007 murder of an ethnic Armenian journalist.

Anadolu Agency says Ramazan Akyurek was detained Thursday in Ankara for the death of Hrant Dink.

Dink was gunned down outside his Agos newspaper by a nationalist teenage gunman who was convicted in 2011. The trial, however, failed to shed light on alleged official negligence or even collusion.

Akyurek's detention follows a court ruling in June that reopened a negligence probe.

Akyurek was among hundreds of police removed from their posts amid a purge of officers believed to be linked to a movement led by a U.S.-based Islamic cleric, which is accused of orchestrating corruption allegations targeting officials.