A big storm over occupied Crimea damaged Russia's naval defenses there, a report said.
Satellite images showed damage to booms and barges meant to defend from sea drones.
AdvertisementSevastopol is Russia's main naval base in Crimea, the Ukrainian peninsula it has occupied since 2014.
UK intelligence officials also said last month that Russia had moved some naval operations away from Crimea as Ukraine continued its attacks.
AdvertisementUkraine has also been using sea drones to target the fleet, including an attack earlier this month which Ukraine said hit two Russian vessels.
Persons:
—, Basil Germond, Insider's Mia Jankowicz
Organizations:
Service, Planet Labs, Reuters, Ukraine ramped, Lancaster University, Elite Ukrainian
Locations:
Crimea, Ukraine, Sevastopol, Russia