Turkey accused Russia of a “provocation” on Sunday after a a Russian soldier on the deck of a naval ship allegedly held a rocket launcher on his shoulder while the vessel passed through Istanbul, according to Reuters.

The NTV news channel showed photographs where a Russian soldier holds a rocket launcher on the deck of Caesar Kunikov ship as it passed on Sunday through the Bosphorus Strait, in Istanbul.

“For a Russian soldier to display a rocket launcher or something similar while passing on a Russian warship is a provocation,” Foreign Minister Mevlut Cavusoglu told reporters, as Hurriyet news site says. “If we perceive a threatening situation, we will give the necessary response.”