Turkish Foreign Minister Mevlut Cavusoglu expressed his anger over new pictures of a Russian sailor holding a rocket launcher while his ship was in Turkish waters.
"Russian war vessels showing weapons is a provocation," Cavusoglu told NTV television.
The ship, the Caesar Kunikov, is part of the Russian navy's Black Seat fleet. It passed through the Bosphorus, which is controlled by Turkey, over the weekend, during which time the picture was taken.