The warning came as NATO's allies signed off on the accession protocols for Sweden and Finland.
In light of Moscow's recent capture of Lysychansk, footage appears to show Ukrainian forces facing off against Russian troops in the Donetsk region.
Clips shared on Telegram by Kyiv-based Ukrainian news agency UNIAN show missiles being intercepted midair.
Ukrainian military officials said Saturday its artillerymen destroyed a Russian Pantsir-1S missile system, shown in released images.
Ukrainian forces reportedly hit a Russian ammunition depot in the Donetsk region at night, causing a massive explosion.
The missile system, which appears to be a Buk-M1, can be seen firing a missile high into the sky before it apparently hits an unknown target.
The Kremlin said it would "hardly be considered appropriate" for Russia to wish Biden a happy Independence Day.
A growing number of top Russian players are opting against playing for their country, according to Emil Sutovsky, FIDE's director general.
Russia rarely discloses its own military losses. Moscow last released figures on March 25, when a general told state media that 1,351 soldiers had been killed.
State Duma member Andrei Gurulyov said a new Cuban missile crisis could result in the beginning of negotiations between the U.S. and Russia over Ukraine.
This Independence Day, everyday Americans are showing that welcoming is an integral part of our nation's values.
Ivan Fedotov was reportedly detained for allegedly avoiding military service in Russia.
There's no way Ukraine and the EU can replace all of its Russian gas needs before winter hits.
State Duma deputy Oleg Morozov took aim at the U.S. in the wake of Sunday's explosions in the Russian city of Belgorod near the Ukraine border.
Since Russia's invasion, Ukrainian officials have accused the Russians of stealing its grain and trying to sell it abroad.
Russian authorities renamed the square outside the embassy after one of the separatist regions of Ukraine that Russia recognizes as sovereign.
Russia's defense minister Sergei Shoigu told President Vladimir Putin that Russia's troops have "full control over Lysychansk," according to the Russian Defense Ministry.
Lysychansk would give Russian forces full control over the contested Luhansk region in Eastern Ukraine.
Russian military vehicles were successfully hit by Ukrainian ordnance as footage released by Ukraine military shows.
The Ukrainian military said troops used a BM-27 Uragan self-propelled 220-mm multiple rocket launcher to blast the Russian ammunition depot in the country's eastern Donbas region.
The Russian Ministry of Defense (MoD) claims its Air Force has hit Ukrainian forces in a number of attacks as they released a video showing the jets in action.
The footage shows a Polish AHS Krab, a self-propelled tracked gun-howitzer in action.
The drone "was aptly 'discharged from performing tasks for purpose' by our anti-aircraft missile unit," Ukraine's Operational Command South said Friday.
The Defense Department announced more missile systems and ammunition are being provided to Ukraine.
Heartbreaking images show rescuers removing the lifeless body of a 21-year-old woman from the remains of a bombed-out building in Mykolaiv in southern Ukraine.
Self-propelled howitzers, while similar to tanks, are usually much more fragile and are fundamentally different in that they cannot usually withstand direct missile from heavy weaponry.
Rescue efforts are ongoing after Russian nighttime missile strikes killed at least 19 people and injured another 38 on the outskirts of Odesa.
The Stugna-P is a Ukrainian-made, anti-tank guided missile that was designed in the early 2010s to destroy modern armored vehicles.
A report of sanctions on Russian individuals and defense manufacturers not being punitive enough follows new worldwide sanctions imposed this week.