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.

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,

Ukrainians faced fresh Russian drone and missile strikes on energy infrastructure nationwide on Tuesday night into Christmas Day morning.

Western equipment has slotted in to Ukraine's embattled, Soviet-era military throughout the war, including long-range missiles and advanced fighter jets.

Pope Francis has called for a “negotiation” to end the war in Ukraine in a Christmas Day message where he appealed for weapons to be laid down in global conflicts and reconciliation between enemies.

Zelensky warns of greater military cooperation between Moscow and Pyongyang, including sending more troops and military equipment

President Biden on Wednesday denounced Russia’s latest attack on Ukraine, declaring the wave of missiles and drones “outrageous.” “The purpose of this outrageous attack was to cut off the Ukrainian people’s access to heat and electricity during winter and to jeopardize the safety of its grid,

Ukraine's air force says it detected 184 missiles and drones, causing damage to energy infrastructure across the country.

Russia launches a Christmas Day missile attack on Ukraine as the war enters its third year. NBC News’ Erin McLaughlin reports on the shifting battleground there and in Washington, D.C.

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.