Border guards who died defending Snake Island will be awarded the title "Hero of Ukraine."
The guards reportedly died after refusing to surrender to a Russian warship.
"May the memory of those who gave their lives for Ukraine live forever," President Volodymyr Zelensky said.
"May the memory of those who gave their lives for Ukraine live forever," he said.
At least 137 Ukrainian soldiers have been killed on the first day of fighting, according to Zelensky, and another 316 wounded.