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Attacks on Russia's capital 'sending a powerful message'
Attacks on Moscow aren't achieving much tactically but are "sending a powerful message", says military analyst Sean Bell.
He tells Sky News millions of people in the Russian capital will be "increasingly concerned" about repeated drone strikes, which will in turn "raise questions about Putin's ability to protect the population".
"People will be getting increasingly angry," he explains.
Moscow separately claimed it had repelled an attack on its Black Sea fleet hours before the alleged drone attack on its capital.
"Russia claims that it shot their drone out of the water. But as ever at sea, there's no independent verification," Bell says.
"Russia always claims that it's destroyed the drones. If you remember the last two attacks, they said they hadn't caused any damage. The next day, two ships were limping back into port, listing heavily to one side."
Though we don't know the exact details of last night's attack, Russia advising of another drone attack "show this is quite widespread," Bell adds.
Ukraine war latest: Huge fire breaks out at Russian port; why 'drone attack' on Moscow sends powerful message to Putin