Ukrainian President, Volodymyr Zelensky, has demanded answers for the families of soldiers killed in a missile strike during an awards ceremony on Friday.
A Ukrainian unit said 19 of its soldiers were killed in a Russian attack near the front lines in the southern Zaporizhzhia region.
The 128th Mountain Assault Brigade said its “best fighters have been killed”.
Many have expressed disbelief that the ceremony was allowed to go ahead so near to the front line.
President Zelensky said the incident “could have been avoided”.
“Criminal proceedings have been initiated,” the Ukrainian leader added in a post on social media on Sunday.
“Every soldier in the combat zone – in the enemy’s line of fire and aerial reconnaissance – knows how to behave in the open, how to ensure safety.”
A number of Ukrainian soldiers and military experts say the ceremony should not have taken place in a strike-risk area.
They say Ukrainian officers should have been aware that Russian drones are constantly monitoring Ukrainian troops’ activities near the frontlines to guide air and artillery strikes.
Drone footage has now emerged on a Russian Telegram channel purportedly showing the moment of the deadly strike – on what appears to be an open-air ceremony.
A number of bodies, believed to be those of Ukrainian soldiers, are also seen lying on the ground.
Russia’s military has not officially commented on the attack.
Ukrainian Defence Minister, Rustem Umerov, had earlier confirmed reports that soldiers from the 128th Mountain Assault Brigade had been killed in the strike.
He ordered a “full investigation” into what he described as a “tragedy”.
Meanwhile, Ukraine’s Strategic Command (StratCom) said an Iskander-M – a short-range ballistic missile used by Russia – was used in the attack. A number of civilians were injured.
In his own statement, President Zelensky said he wanted to “establish the complete truth about what happened and prevent such incidents from happening again”.
Three days of mourning have been declared in Ukraine’s westernmost Transcarpathia region, where many of the victims are believed to be from.
—BBC