Russia's hardliners are furious over its latest loss at sea, saying commanders would rather cover up mistakes than learn

• Ukraine said on Tuesday it had sunk another Russian warship using a sea drone.
• Russian milbloggers are furious about what they say are mistakes by commanders.
• Ukraine has achieved a series of astonishing victories over Russia in the Black Sea. 

Russian milbloggers appear to be blaming inept commanders for the sinking of a $65 million Russian warship.

Ukrainian military intelligence said on Tuesday that it had scored another success in its campaign against Russia's much bigger Russian Black Sea fleet.