It is Monday morning (Beijing Time), and Russia's military operation in Ukraine has entered its fifth day. Here is what you need to know:

On the ground: Ukraine said on Sunday its second-largest city, Kharkiv, is still under the control of its military after overnight fighting with Russian forces. A day earlier, on Saturday, Russia said that its forces had established full control over the southern Ukrainian city of Melitopol.

Casualties: The Russian Defense Ministry on Sunday night said there had been casualties among its military personnel since the beginning of the operation. Meanwhile, Ukraine's Health Ministry said that 352 civilians, including 14 children, were killed. The UN Office for the Coordination of Humanitarian Affairs reported on Sunday that at least 64 civilians had been killed. None of the tolls could be independently verified.

Negotiations: Talks between the Russian and Ukrainian delegations are due to begin on Monday morning near the Belarusian border, TASS reported on Sunday citing sources.

UN reaction: The United Nations Security Council voted Sunday to hold a rare emergency special session of the General Assembly to discuss Russia's military action in Ukraine. It is scheduled to start at 10:00 a.m. in New York (11:00 p.m. Beijing Time) and is expected to last at least all day.

Sanctions: Leaders of the Group of Seven said on Sunday that Western allies have decided to cut off some Russian banks from the worldwide interbanking communication system SWIFT. The EU on Sunday announced shutting down its airspace for Russian airliners.

Refugees: Around 400,000 Ukrainians have fled their homes since the conflict erupted on Thursday, according to the UN refugee agency UNHCR on Sunday. Refugees poured across Ukraine's western borders on Saturday, with more than 100,000 reaching Poland so far.

(Cover: Ukrainian soldiers take positions outside a military facility as two cars burn in a street in Kyiv, Ukraine, February 26, 2022. /CFP)