Previously, Russia’s ambassador to the United Nations in Geneva had resigned, according to UN Watch

Now, the seasoned diplomat has confirmed the news, stating he resigned before writing a blistering letter to his overseas counterparts.

Boris Bondarev complained in his letter about Vladimir Putin’s “aggressive war.”

A diplomatic official forwarded his English-language statement to The Associated Press.

The 41-year-old announced his resignation in a letter.

“For 20 years of my diplomatic career I have seen different turns of our foreign policy, but never have I been so ashamed of my country as on 24 February of this year,” he wrote.

Mr Bondarev said: “Today, the ministry of foreign affairs is not about diplomacy. It is all about warmongering, lies, and hatred.”