Admiral Kasatonov, carrying nuclear-capable Zircon missiles, sailed near Fehmarn with its transponder disabled, complicating tracking.
It is the second Russian warship in the Baltic recently, following the destroyer Admiral Levchenko's late-July arrival.
The deployment coincides with Putin and Medvedev threatening retaliation over Western seizures of Russia's shadow fleet tankers.
Russian Frigate Armed With Nuclear-Capable Zircons Appears Off German Coast With Tracker Switched Off

