Ukrainian officials reported that airstrikes had hit the western city of Lviv on Saturday afternoon after explosions were heard earlier outside the city.
At least five people were wounded.
"There have been two rocket strikes within the limits of Lviv," regional Governor Maksym Kozytskyy said.
The city's mayor, Andriy Sadovyi, also said the city had been targeted by airstrikes in a post on Telegram.
The mayor later said that "an industrial facility where fuel is stored caught fire" as a result of the attack, but that "no residential buildings were damaged." "All relevant departments are working on site," he wrote on Telegram.
Ukrainian authorities had previously reported three large explosions near the western Ukrainian city of Lviv and urged residents to take shelter.
"There were three powerful explosions near Lviv in direction of Kryvchytsy, now there is an air raid warning, so "keep calm and take shelter," Kozytskyy said in an online post, referring to an to the east of the city.
Located in the far west of Ukraine near the border with Poland, Lviv so far has been spared from major Russian attacks and is a destination for refugees.
It is the largest city in western Ukraine.