Russia’s top security agency says it has arrested four Russians accused of making preparations to kill senior Defense Ministry officials on Ukraine's orders.

To ensure the safety of civil aircraft flights, temporary restrictions have been introduced on the operation of Sheremetyevo, Domodedovo, Vnukovo, Zhukovsky and Kaluga airports,” Russia’s aviation authority said.

The missile has been branded as Ukraine's answer to dwindling Western aid, building self-reliance in defense technologies.

Iranian President Masoud Pezeshkian is set to visit Moscow on Jan. 17 and sign a cooperation agreement with Russian President Vladimir Putin, Russian state news agency RIA cited Iran's ambassador to Russia as saying on Thursday.

A Russian general who was wanted by Ukraine for using chemical munitions was killed by a remotely detonated bomb in Moscow on Tuesday, Russian authorities said.

A massive Russian missile and drone barrage on Ukraine's energy infrastructure on Christmas morning was "inhumane," Ukrainian President Zelenskyy said.

Igor Kirillov, who was named the head of Russia’s nuclear defense forces in April 2017, was under sanctions from several countries including the U.K. and Canada for his role in Ukraine.

Ukraine could consider continued transit of Russian gas on the condition that Moscow does not receive money for the fuel until after the war, President Volodymyr Zelenskiy said on Thursday.

A Russian general was killed today by a bomb on a Moscow street. Ukraine claimed responsibility for what appears to be one of the most brazen assassinations since Russia’s full-scale invasion nearly three years ago.

But he attached numerous caveats to the idea of compromise, suggesting Moscow’s goal of subjugating Ukraine and winning major security guarantees remain in place. Read the analysis by Steve ...

President Vladimir Putin said on Thursday there was no time left this year to sign a new Ukrainian gas transit deal, and laid the blame firmly on Ukraine for refusing to extend the agreement that brings gas to Slovakia,