In a telephone conversation, the Russian military has even coined a new term — "natural demining".
Background
An adviser to Mariupol's mayor, Petro Andrushchenko – who has also moved to Ukrainian-held territory – told CNN Mariupol town hall officials believe at least 22,000 residents of the city were killed during three months of war.
The city is battling a potential cholera outbreak, according to a British intelligence report.