Ukraine will launch its first war crimes trial over Moscow's ongoing invasion, bringing a 21-year-old Russian soldier to the stand, Kyiv's top prosecutor announced Wednesday.

Vadim Shishimarin is accused of killing an unarmed 62-year-old civilian on February 28, firing an automatic rifle from a car window to prevent him from reporting a group of soldiers, according to a statement from Prosecutor General Iryna Venediktova's office.

After his convoy was hit, Shishimarin and four other fleeing soldiers stole a car from outside the village of Chupakhivka, the statement added.

The civilian, who was not named, was riding his bicycle on the side of the road not far from his home, the office said.

"One of the military servicemen ordered the accused to kill a civilian so that he would not report them," according to the statement.

"The man died on the spot just a few dozen metres from his home."

More than 10,700 alleged war crimes have been registered with the Ukrainian top prosecutor's office
More than 10,700 alleged war crimes have been registered with the Ukrainian top prosecutor's office AFP / Dimitar DILKOFF

The Russian service member, who is in custody, faces possible life imprisonment on charges of war crimes and premeditated murder.

Venediktova did not say when the trial would take place.

Her office released a photo of Shishimarin but did not detail how he came to be in Ukrainian custody or what happened to the others in his group at the time of the alleged killing.

More than 10,700 alleged war crimes involving 622 suspects have been registered with the prosecutor's office.

Kyiv and Washington have repeatedly accused Russian troops of committing war crimes since the February 24 invasion.

The conflict has sparked a massive exodus of nearly six million Ukrainians, many of whom bear accounts of torture, sexual violence and indiscriminate destruction.

Britain and the Netherlands have sent war crimes investigators to Ukraine to assist local and International Criminal Court teams probing possible mass atrocities -- including in the Kyiv suburb of Bucha, where at least 20 bodies were discovered on April 2.