UN: More than 4 million people have fled Ukraine since Feb. 24.

Ukraine's Unmanned Systems Forces hit an oil depot in occupied Luhansk and destroyed two Russian Tor air defense systems, valued at over $50 million, in occupied Donetsk Oblast, the military said.

The arms deal was signed in Moscow in December, and requires Russia to send Iran 500 "Verba" Man-Portable Air-Defense System (MANPADS) launch units and 2,500 9M336 surface-to-air missiles over three years, the Financial Times reported.

A woman has been arrested in connection to a suspected terrorist attack that killed a police officer and injured 25 others in the Western city of Lviv in the early hours of Sunday morning, Ukrainian authorities said.

Several rounds of explosions were reported in Kyiv overnight on Feb. 22, leaving a mother and her child injured as Russia launched ballistic missiles at Ukraine.

Twenty drones were shot down en route to Moscow during the afternoon of Feb. 22, Mayor Sergey Sobyanin claimed.

The factory, located in Trostianets in Sumy Oblast, was struck by a missile, Ukraine's Foreign Minister Andrii Sybiha said. The plant has operated since the 1990s, and produces a range of well-known products, including Oreo and Milka.

Hungary said it would block the EU's new sanctions package against Russia over halted oil deliveries through Ukraine, the latest development in a deepening spat between Ukraine and its neighbors, Slovakia and Hungary, over Russian oil imports.

In the latest episode of Ukraine This Week, the Kyiv Independent’s Anna Belokur examines how global support for Ukraine has shifted four years into Russia’s full-scale invasion.

The number includes 890 casualties that Russian forces suffered over the past day.

Russia launched a large-scale combined drone and missile attack in the early hours of Sunday, firing 50 missiles and 297 long-range kamikaze drones, predominantly towards Kyiv and its suburbs.

A Russian drone attack in northeastern Ukraine's Sumy Oblast killed two brothers and a married couple, while a missile attack damaged a production facility belonging to U.S. multinational company Mondelez, authorities reported Feb. 21.

Ukraine's Foreign Ministry condemned what it described as "ultimatums and blackmail" from Hungary and Slovakia after the two countries threatened to halt emergency electricity supplies.

President Volodymyr Zelensky announced Feb. 21 that Ukraine is imposing new sanctions targeting the captains of Russia's shadow fleet.