The first mortar rounds are outgoing, aimed at Russian forces beyond a ridge. But the ones that follow are incoming, heading for Ukrainian positions, and land near the troops in their base.
The exchanges take place at Ruska Lozova, a village set in a landscape of woodland, valleys, streams and fields, which was officially liberated at the end of last month by Ukrainian troops, driving away the Russian forces that had laid siege to nearby Kharkiv.
