The head of the Lviv regional military administration in western Ukraine said Ukrainian anti-aircraft systems downed Russian cruise missiles that were fired on Saturday morning toward the Lviv region.
"In the morning of April 16, missiles were fired at the Lviv region from Su-35 aircraft of the Russian occupiers," Regional military governor Maksym Kozytsky said. "Units of anti-aircraft missile forces Air Command West of the Air Force of the Armed Forces of Ukraine destroyed four cruise missiles."
Kozytsky also claimed the Russian aircraft that fired the missiles had taken off from Baranovichi airfield in neighboring Belarus.
Some context: Belarus has been used as a springboard for many of Russia's air operations in Ukraine, according to intelligence collected by NATO surveillance planes.
The Ukrainian military previously said it has shot down several missiles fired towards its territory from Belarus.
After Russia failed to gain the ground it wanted around Kyiv, forces retreated back into Belarus to regroup and redeploy. Belarus has also been recognized as a key ally for Russia on the world stage.
While NATO fears that the Kremlin may call on Belarusian President Alexander Lukashenko to deploy his army to bolster Moscow's forces on the battlefield, US President Joe Biden leveled twin sanctions against both countries on April 8.
One bill suspends normal trade relations with Russia and Belarus and punishes the countries by paving the way for higher tariffs on imports from them, while the other prohibits energy imports from Russia, including oil, coal and natural gas.
CNN's Salma Abdelaziz, Sarah Dean, Li-Lian Ahlskog Hou and Nikki Carvajal contributed reporting to this post.