Reports suggest that the soldier is Tymofiy Mykolayovych Shadura, who has been missing since last month.
Ukraine has vowed to avenge the death of a soldier it said was shot by Russian troops in a video that spread on social media.
The video, which emerged online on Monday, purportedly shows the killing of an unarmed Ukrainian soldier.
In a statement last night, Ukrainian President Volodymyr Zelenskyy said “the occupiers” killed “a warrior who bravely said to their faces: “Slava Ukraini!”, or “Glory to Ukraine!”
Sky News has been unable to independently verify the location and date of the footage.
But Ukraine’s 30th Separate Mechanized Brigade said the deceased was thought to be serviceman Tymofiy Mykolayovych Shadura, who has been missing since 3 February, after hostilities in the area of the city of Bakhmut.
Formal identification is yet to be established.