CNN: Explosions heard in Kyiv.

At least six people were injured in a Russian drone attack on the city of Sumy overnight on April 21, local authorities reported.

The number includes 1,040 casualties that Russian forces suffered over the past day.

Explosions were reported overnight in the Russian city of Novocherkassk in Rostov Oblast, according to Russian media and Telegram channels.

Two police officers in Kyiv have been formally notified of suspicion over their actions during the mass shooting in the city on April 18, Ukraine’s State Bureau of Investigation and Prosecutor General Ruslan Kravchenko said.

President Volodymyr Zelensky voiced doubts about peace talks in an April 20 interview, as U.S. envoys Steve Witkoff and Jared Kushner are expected to meet with Ukrainian officials amid stalled negotiations with Russia.

Russian drone attacks on Dnipropetrovsk and Kharkiv oblasts on April 20 killed three and injured 18 others, authorities reported.

Ukraine's defense ministry is testing a unified ground control station for fiber-optic drones, aiming to cut the number of incompatible systems troops carry to the front.

The figure, counted up in an investigation by the Novaya Gazeta Europe, comes as Russia continues to militarize its society, with a specific focus on children, preparing the next generations for joining the country's wars.

Kyiv's intention to pursue such a system is not new, but the announcement marks the first time officials have attached such an ambitious timeline to the effort.

"During the Spring Meetings, we found understanding from our partners that this is indeed a sensitive topic and a non-constructive idea," Ukrainian Prime Minister Yulia Svyrydenko said on April 19 in a Telegram post, referring to the new VAT tax.

His electoral win marks a victory for pro-Russian representation in the EU.