This is the third joint naval drill between the countries since 2019 as Tehran and Moscow seek to step up military cooperation with Beijing amid regional tensions with Washington.
Turkey's President Recep Tayyip Erdogan says Turkish navy makes nation proud with its expertise as he attends the Observer Day activity of Blue Homeland-2021 Exercise in the Aegean Sea via video call.
Ankara warns Athens not to raise eastern Mediterranean tensions or it'll not hesitate to do "what is necessary", though it said it wants to solve differences through talks and expects EU to act as "honest" mediator.
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