In its latest report, the Institute for the Study of War (ISW) says a possible Ukrainian counter-offensive near Bakhmut is raising concerns for Russia.

"The pace of Russian offensive operations across the battlefield has slowed in recent weeks, suggesting that Russia's spring offensive in the Donbass may be nearing its climax," the report said.

Ukrainian officials have indicated that significant Russian losses near Vuledar are seriously hampering the ability of Russian forces to conduct further offensive operations in the Donetsk region.

NEW: Tonight's report discusses growing Russian concern about a prospective Ukrainian counteroffensive near Bakhmut or in southern Ukraine and Russian efforts to prepare mitigations for these claimed efforts. https://t.co/e84fWxvjV3 pic.twitter.com/9KgsqplPZo

- ISW (@TheStudyofWar) March 20, 2023

"Russian President Vladimir Putin used his first visit to Mariupol to portray himself as an engaged military leader amid fears of a possible future Ukrainian counteroffensive in southern Ukraine," the Institute writes.