Kursk

Serhii had just been released from a Russian prison in Kursk.

The General Staff's daily briefings only mentioned clashes and other military activities in "the Kursk direction" - meaning towards the border with Russia - without naming any specific locations.

The Sumy region has come under repeated bombardment, and Ukraine launched a months-long occupation of part of Russia's neighbouring Kursk region from there.

The 22-year-old was captured last November in Russia's Kursk region - where Ukrainian forces began a surprise incursion last August before retreating in recent months.

Putin’s forces have continued to make small gains in Eastern Ukraine and have pushed Ukrainian forces into a tiny defensive perimeter in the Kursk region of Russia, which Ukraine invaded and has occupied for months.