Despite the onslaught, big cities in Ukraine remain under Russian control.

• Despite heavy fighting, Ukraine remains in control of its capital Kyiv and its second-largest city, Kharkiv, according to the latest intelligence update from the U.K. Defence Ministry.
• New weapons shipments have been committed to Ukraine by the United States, European Union, and even Germany, as its defenders have persistently resisted the Russian attack.

Despite more than four days of Russia's invasion of Ukraine, Ukraine's defenders are still managing to thwart Russian efforts to capture its major cities.

The Ukrainian Armed Forces are facing stiff resistance from Russian forces as they continue to advance into Ukraine from multiple directions, according to the U.K. Defence Ministry.

Despite heavy fighting, Ukraine remains in control of its capital Kyiv and its second-largest city, Kharkiv, according to the latest intelligence update from the U.K. Defence Ministry.

The Ukrainian general in charge of Kyiv's defense, Alexander Syrsky, stated in a Facebook post that the capital's situation is under control.

The Russian Occupation Forces' efforts to achieve their objective were unsuccessful, as evidenced by the destruction of their equipment convoys, according to an NBC News translation of what he said.

Russian troops are demoralized and exhausted, according to Syrsky. We have shown that we know how to protect our home from uninvited guests, he said.

It is challenging to verify individual military accounts due to the unstable and inaccessible conditions in much of Ukraine.

According to the U.K. Defence Ministry, Kharkiv's regional governor, and Ukraine's Ministry of Internal Affairs, intense fighting was occurring in the vicinity of Kharkiv.

On Sunday, a senior U.S. Defense official stated that Ukrainian forces continue to control Kherson, a key city targeted by Moscow, while remaining anonymous.

The Defense official stated that Russian advances were being slowed due to "fuel and logistics shortages, particularly in Kharkiv, as well as on the advance to Kyiv."

Last week, the UN Security Council convened in an emergency session to prevent war in Ukraine, but Vladimir Putin decided to invade the country regardless.

New weapons shipments have been committed to Ukraine by the United States, European Union, and Germany, as its defenders have persistently resisted the Russian invasion.

By the day, Western corporations and governments are implementing new economic measures against Russia.

Prior to Putin's order of the invasion, U.S. intelligence predicted it and Russia's president repeatedly demanded assurances that Ukraine would never join NATO.

"Mr. Putin's statement that he doesn't want a strong NATO on his western flank is being realized as he is getting exactly that," said U.S. Secretary of Defense Lloyd Austin in a Pentagon statement on Sunday night ET.