News reports from Turkey say authorities have suspended the head of Istanbul's police intelligence as part of their investigation into last month's killing of Turkish-Armenian journalist Hrant Dink.
The reports cited Interior Ministry officials as saying the intelligence chief Ahmet Ilhan Guler was removed for failing to follow-up on a tip about a plot to kill the journalist.
A 17-year-old youth, Ogun Samast, has confessed to gunning down Dink in Istanbul January 19. Seven other people have been charged in connection with the killing.
The Turkish government has pledged a full investigation into the slaying of Dink, who angered Turkish nationalists by using the term "genocide" to describe the mass killings of Armenians under the Ottoman Empire in the early 1900s.
Turkey rejects use of the term genocide.
Dink was sentenced to six months in detention last year on charges of insulting Turkey's national identity.
Authorities have been investigating security forces who posed for photographs with the confessed killer. Photographs and film footage have emerged showing Samast posing with a Turkish flag and the security forces after his arrest.
Some information for this report was provided by AFP and AP.