The fourth Russian general has been killed since the invasion began.
The Russian assault on the city of Mariupol resulted in the death of the Maj. General, according to an advisor to the Ukrainian Interior Ministry.
A photo of the dead person was posted by Gerashchenko. Russia has not commented on the claim that the image is authentic.
According to officials from unnamed Western governments, Russia sent 20 Major Generals to lead the invasion.
Losing so many top-ranking officers would be a huge blow to the Russian military.
Since the beginning of the invasion on February 24, the other generals have been killed.
Gerasimov was the first deputy commander of the 41st army. The intelligence unit of the Ukrainian defense ministry said that he was killed in Kharkiv. The death has not been acknowledged by Russia.
According to reports in the Russian media, a deputy commander of the 41st army was killed in February.
Ukrainian President Volodymyr Zelenskyy claimed the Russian offensive was losing steam.
Many Russian conscripts died. Dozens of police officers. A general is among the dead invaders. He said at least one general. It's not clear if he was talking about Mityaev.
Zelenskyy has used his video addresses to plead with Russian soldiers to lay down their arms.
Russia has been shelling the southern city of Mariupol for weeks.
According to CNN, Ukrainian officials estimate that around 2,500 people have been killed in the city.
The Russian and Ukrainian foreign ministers have been holding peace talks.
Negotiations have not been easy, but there is hope for reaching a compromise, according to the state-run Interfax Russian news agency.