Kyiv: 40-mile-long Russian military convoy closes in on capital

US officials — who were previously surprised by the fierce Ukrainian resistance that saw regular citizens take up arms — now fear that the situation is becoming “a lot more challenging” for the Ukrainians.

US officials told the briefing Monday that Russia would likely lay siege to Kyiv, leading to ugly scenes of urban warfare, one of the people familiar with the matter said.

Kharkiv residents sleep dressed, ready to run

On Tuesday, Kharkiv was rocked by a large explosion, which incinerated cars, blew out windows and destroyed a large government building in the main Freedom Square.

Emergency services say at least six people were injured in what Ukrainian President Volodymyr Zelensky described as an “act of terror” on civilians in a Facebook post.

Hours before, at least five separate residential areas in Kharkiv were hit by rockets, according to CNN analysis of social media videos.

A resident there named Tetyana, 66, told CNN that a shell hit her house early Tuesday morning, shattering its windows.

Tetyana — who sleeps in her shoes and coat since the invasion began — ran to her basement where her relative Oleg told her that his car had burned down and “the school in the yard was totally destroyed.”

The day before, CNN confirmed five residential areas in the city had been hit by military strikes on Monday using videos shared on social media.

Dramatic video, taken by a surveillance-type camera at an apartment complex on Velyka Kil’tseva St, shows repeated explosions from one strike that landed in a parking lot and walkway.

The intense shelling — at least eight explosions are seen but there are more heard — lasts for 20 seconds. As the munitions rain down, people are seen running as the explosions dot the ground: one individual falls to the ground as explosions surround them. A parked car explodes after taking a direct hit.

On Klochkivska Street, graphic videos shows blood and body parts outside of a small grocery store.

“It’s horrible, guys,” a voice in the video says. “Right in my part of the city. Boots and leg were removed, here’s parts of brain.”

Circling in on Kyiv

Meanwhile, a massive 40-mile-long Russian military convoy — made up of armored vehicles, tanks, towed artillery and other logistical vehicles — has reached the outskirts of Ukraine’s capital, Kyiv, according to satellite images from Maxar Technologies. Maxar said it saw plumes of smoke rising from a number of homes and buildings near the roads where the convoy is traveling, although it’s unclear what the cause was.

US officials told lawmakers in classified briefings Monday that a second wave of Russian troops will likely consolidate the country’s positions within Ukraine, and by sheer numbers could be able to overcome the Ukrainian resistance, according to two people familiar with the briefings.

“That part was disheartening,” one lawmaker told CNN.

Russian forces enter port city

Russian-backed forces have also made gains down South. In the port city of Kherson — west of Mariupol and north of the Crimean Peninsula, which Russia annexed in 2014 — Ukrainian defensive lines appear to have fallen and Russian military vehicles have seen driving inside the city.

The leader of the self-declared separatist region OF? Donetsk said he expects his forces to surround the Ukrainian port city of Mariupol on Tuesday. The town of Volnovakha, half-way between Mariupol and Donetsk, was almost completely surrounded, Denis Pushilin added.

Ukraine has accused Russia of committing war crimes by targeting civilians, and on Monday, the International Criminal Court said it would open an investigation into Russia’s invasion of Ukraine — a move that was welcomed by Kyiv.

In a late night address, Ukrainian President Volodymyr Zelensky said attacks on Kharkiv on Monday were “clearly a war crime.”

“Kharkiv is a peaceful city, there are peaceful residential areas, no military facilities. Dozens of eyewitness accounts prove that this is not a single false volley, but deliberate destruction of people. The Russians knew where they were shooting,” he said.

“No one in the world will forgive you for killing peaceful Ukrainian people.”.

The Kremlin has denied Zelensky’s accusations of war crimes in Ukraine, repeatedly saying it is not targeting civilian areas.

Humanitarian crisis looming

As bitter fighting takes place across the country, many Ukrainians are fleeing the country.

There are already 520,000 refugees from Ukraine in neighboring countries, with the figure rising “exponentially, hour after hour,” Filippo Grandi, the UN’s refugee agency’s chief, told the UN Security Council on Monday.

Foreigners are also desperately trying to leave the country. In the Ukrainian village of Shehyni on the border with Poland, foreign nationals are having to wait in the cold for hours to get out, with some even lighting fires to keep warm.

Other Ukrainians have opted to stay and join the resistance. Volunteers are pouring into the capital, where there’s a feeling of defiance among many. Some are gathering bottles to make Molotov cocktails.

Nevertheless, the picture for those in Ukraine is “grim” — and could get worse, UN Office for the Coordination of Humanitarian Affairs (OCHA)’s Martin Griffiths said Monday.

“Aerial attacks and fighting in urban areas are damaging critical civilian facilities and disrupting essential services such as health, electricity, water and sanitation, which effectively leaves civilians without the basics for day-to-day life,” said Griffiths, OCHA’s under-secretary-general for humanitarian affairs and emergency relief coordinator.

He said the real number of civilian casualties “could be considerably higher, as many reported casualties have yet to be confirmed.”