There have been several explosions in the southern Ukrainian city of Mykolaiv, according to the regional administration. Details on casualties and locations have not been released.
Witnesses reported hearing three large blasts and images from the city showed at least one large column of black smoke.
The explosions follow missile attacks on the area around Mykolaiv on Monday.
The area along Mykolaiv’s border with the Kherson region continues to see shelling by Russian forces defending the territory they have seized, according to the Ukrainian military.
The regional administration said the town of Shyroke, 50 kilometers (31 miles) east of Mykolaiv, was shelled Monday night and Tuesday morning.
“According to preliminary information, there are no victims,” it said.
The front lines in the Mykolaiv-Kherson regions have changed little in the past month, although Ukrainian forces made some modest gains in a counter-offensive that began early in June.