Marines accused of being involved in the stunt had scrawled a swastika on their comrade in an “initiation” ceremony, The Mail on Sunday reports.
The alleged scandal occurred during a training exercise to prepare for any future conflict with Russia, the title reports.
Top brass reportedly fears the shameful video being leaked, and a senior officer warned troops that anyone sharing the clip would face disciplinary action.
Those allegedly involved were members of the Future Commando Force (FCF).
“This wasn’t a time to get drunk, daub swastikas on each other and do other unthinkable acts”Commando
In a message to troops, a senior officer wrote: “The Commandant General Royal Marines has directed that anyone with the recent video from Ex BP [Exercise Baltic Protector] is to delete it immediately.
“Anyone found forwarding it, particularly to public forums, will face disciplinary action.
“It includes booze, s*** and swastikas.
“If it reaches social media we can kiss goodbye to any additional responsibilities as well as runs ashore [social privileges].
“Talk of it may kill FCF dead.”
One commando told The Mail on Sunday: “No wonder senior officers were desperate to destroy all the evidence that this Nazi ritual took place.
“Exercise Baltic Protector was supposed to send President Putin a message that we’ve got the amphibious capability to defend Baltic and Scandinavian states.
“This wasn’t a time to get drunk, daub swastikas on each other and do other unthinkable acts.
“Military chiefs might expect it to happen very occasionally back home, but never on a ship sailing near Russian waters. It looks so unprofessional.
“It will have very serious consequences for those involved and the FCF.”
Last night, a Ministry of Defence spokesman told the title: “We are aware of a video circulating online.
“This behaviour is unacceptable. A formal investigation is under way and it would therefore be inappropriate to comment further.”