A Ukrainian flag attached to helium balloons flew into occupied territory, Kyiv's military said.
Russian soldiers tried to shoot it down but revealed their firing positions, an official said.
"For several hours, the Ukrainian flag was flying over occupied Donetsk.
I had a lot of messages from people living in the occupied territory, who told me they are waiting for the liberation of Donetsk."
Donetsk City has been occupied by Russia since 2014 when fighting in eastern Ukraine began.
Persons:
Vitalii Barabash, Barabash
Organizations:
Service, Ukrainian, Kyiv Independent, Euromaidan Press, Telegram, Donetsk, Guardian
Locations:
Ukraine, Wall, Silicon, Ukrainian, Avdiyivka, Avdiivka, Russian, Donetsk City, Donetsk, Russia, Moscow, Luhansk, Kherson, Kyiv