President Volodymyr Zelenskiy called on Monday for Russia to be punished for more than 183,000 alleged war crimes documented by Ukraine since Moscow's 2022 invasion, saying justice was needed to prevent "evil from proliferating.

Ukrainian troops are making small gains in Russia's Belgorod region, while Donald Trump has taken a swipe at Vladimir Putin.

Ukrainian forces have responded to Russian efforts to expel them from one part of Russian territory by launching a large number of attacks on another border area, using drones, artillery and troops.

Both Kyiv and Moscow last week agreed to freeze attacks in the Black Sea and on energy infrastructure. ABC News’ Marcus Moore reports.

Vladimir Putin has escalated military operations this March, even as ceasefire negotiations have shown some progress. While Ukraine and Russia have only agreed to a 30-day ceasefire on each other's energy infrastructure,