Video shows Ukrainian amphibious vehicle's cannon destroying Russian armor in besieged Mariupol

• The video appears to show a Ukrainian armored personal carrier damaging a Russian tank and destroying another.
• The incident appears to be in or near Mariupol, a Ukrainian port city being sieged by Russian forces.

A video circulating online shows a Ukrainian amphibious vehicle damaging one piece of Russian armor and destroying another in the vicinity of Mariupol, a Ukrainian port city under siege by Russian forces.

The video, posted by a Twitter account that tracks weapons in the conflict between Ukraine and Russia, shows a Ukrainian BTR-4 damaging a Russian T-72B3M tank and destroying a BRM-1K armored vehicle. The Ukrainian BTR-4, known as "Bucephalus," is an 8x8 wheeled armored personal carrier designed in Ukraine and first developed in 2008. The BTR-4 can be used as an armored vehicle in infantry units or to provide fire support in combat, and has a 30mm mounted gun on its roof that can be fired remotely.

The T-72B3M is a tank in the service of Russia and Belarus, and was first rolled out in 2014 as an upgraded version of the T-72B3 battle tank. The BRM-1K is a Soviet-era armored reconnaissance vehicle that is mainly used for self-defense.

Although Russia's military capabilities far outmatch those of Ukraine, the country is fighting back as best it can. Despite their superior military and resources, Russian forces have yet to enter Kyiv, Ukraine's capital city, since they launched their attack on February 24, and appear to be trying to encircle it.

Insider was unable to independently confirm the location or time of the combat video, which appeared amid Russia's heavy barrage of Mariupol that forced locals to dig mass graves.

According to Mariupol's city council, 2,187 residents have been killed since Russia's invasion, Al Jazeera reported. Along with continuous bombings in civilan areas, including a maternity hospital, Russians have sieged the city and cut it off from sources of water, electricity, and heat. Food and water are also running scarce, with some reports that people are draining radiators for water, according to the BBC.

"In [the last] 24 hours, there were at least 22 bombings of the civilian city. Over 100 bombs have been thrown on Mariupol already," Mariupol's city council said in an online statement.