Vladimir Putin's Russian army has lost another commander. Colonel Alexei Sharov is the 15th military leader of Putin, who has been killed in Ukraine since Russia invaded the country. 

The commander of the Zhukov Brigade 810th Guard Order in the Russian Marines, Sharov, was reportedly killed in Mariupol, a town surrounded by Russian troops. 

At least 902 civilians have been killed and 1,459 injured in Ukraine since midnight on March 19, the UN human rights office said. Ten million people have been displaced, including nearly 3.4 million who have fled the country, the UN refugee agency said. 

Moscow has not officially updated the figures for Russian casualties since declaring on March 2 that 498 servicemen had been killed and 1,597 others wounded. Since then, its offensive has met with further resistance from the Ukrainian military. 

Sharov's death comes after the assassination of Colonel Nikolai Ovcharenko, commander of the 45th Engineering Regiment. Sharov is the fifth colonel to be killed in Ukraine and is one of 15 Russian military commanders killed in the war there, according to The Sun. 

Foreign Policy reported that Moscow has suffered the highest number of casualties among high-ranking officials since World War II.