The film debuted at Sundance, where it won the Audience Award for World Cinema Documentary.
Among the atrocities was the Russian bombing of a maternity hospital.
Dogwoof will handle all sales on the pic, excluding North America, where PBS Distribution has acquired rights.

‘20 Days In Mariupol’Dogwoof/Frontline/AP
Mstyslav Chernov and the AP-Frontline team have made an incredible film that highlights the vital role of journalists.
The courage of the team is awe-inspiring and makes for essential viewing.
The deal was negotiated by Cliff Decatrel, Head of Development for The Associated Press, and Veger.
