Ukraine has taken hundreds of Russian prisoners and "embarrassed the system" in Moscow with its brutal Kursk incursion.

       Kyiv's surprise attack earlier this week has pushed Russian troops back miles into their own territory while the bulk of Vladimir Putin's forces continue with the invasion inside Ukraine.

       An expert says the incursion has "created additional doubt in the Russian mind" as Putin reshuffles his military hierarchy.

       Matthew Savill, Director of Military Sciences at RUSI, told Times Radio: "It will certainly be uncomfortable for the Russian military leadership because their narrative has been progress, limited threats, and the Ukrainians are the ones who should be looking for peace.

       "This will embarrass the system. There are movements behind the scenes where we see military officers moved around and officials picked up for corruption.

       READ MORE: Putin's army is disarray as 'hundreds' surrender after Ukraine's brutal attack

       "There is an unease in the Russian military system as to how effective they are." He added: "The fact they were able to move across the border, threaten a major area, capture Russian soldiers. It will create additional doubt in the Russian mind."

       This comes after images circulating online purportedly showed "hundreds" of Russian soldiers surrendering during the incursion.

       Images showed Russian troops lying on the ground and dropping their weapons.

       After the attack, Putin declared a "federal emergency" while denouncing the attack as a "provocation." Then, on Saturday, Putin ordered 76,000 people in the Kursk region to evacuate.

       Representative Artem Sharov said in a statement: "An Interdepartmental Operational Headquarters for providing assistance to the population in the border areas of the Kursk Region has been deployed and continues to operate in the city of Kursk.

       "The priority area of ？？the operational headquarters' work is the resettlement of residents of these areas to safe places.

       "In total, more than 76 thousand people have been temporarily resettled to safe places since the beginning of this work."