ZAPORIZHZHIA, Ukraine (AP) — Ukraine's top prosecutor disclosed plans Wednesday for the first war crimes trial of a captured Russian soldier, as fighting raged in the east and south and the Kremlin left open the possibility of annexing a corner of the country it seized early in the invasion.

Prosecutor General Iryna Venediktova said her office charged Sgt. Vadin Shyshimarin, 21, in the killing of an unarmed 62-year-old civilian who was gunned down while riding a bicycle in February, four days into the war.

Shyshimarin, who served with a tank unit, was accused of firing through a car window on...