NATO intelligence estimates that for every Ukrainian soldier killed defending Bakhmut, Russian forces have lost at least five, a military official with the North Atlantic alliance told CNN on Monday.
The official cautioned the five to one ratio was an informed estimate based on intelligence.
The official spoke to CNN on the condition they remain anonymous because they are not allowed to discuss this intelligence. Despite the favorable ratio, they also said Ukraine was suffering significant losses defending the city.
Ukrainian officials have repeatedly claimed they were inflicting heavy losses on Russia as Moscow tried to take Bakhmut.
“Our defenders inflicted significant losses on the enemy, destroyed a large number of vehicles, forced Wagner's best assault units to fight and reduced the enemy's offensive potential,” Colonel-General Oleksandr Syrskyi, commander of the Ukraine’s land forces said after a visit to Bakhmut on Sunday.
The Institute for the Study of War also said Russia’s efforts to capture Bakhmut had significantly deteriorated its capacity for additional offensives.
“The Russian military will likely struggle to maintain any subsequent offensive operations for some months, giving Ukraine a chance to seize the initiative;” it said on Monday.