KHARKIV, July 21 - Russian shelling pounded a densely populated area in Ukraine’s second-largest city Thursday, killing at least three people and injuring at least 23 others with a barrage that struck a mosque, a medical facility and a shopping area, according to officials and witnesses.

Police in the northeast city of Kharkiv said cluster bombs hit Barabashovo Market, where Associated Press journalists saw a woman crying over her dead husband’s body. Local officials said the shelling also struck a bus stop, a gym and a residential building.

The bombardment came after Russia on Wednesday reiterated its plans to seize territories beyond eastern Ukraine, where the Russian military has spent months trying to conquer the Donbas region, which is south of Kharkiv. It also followed Ukrainian attacks this week on a bridge the Russians have used to supply their forces in occupied areas near Ukraine’s southern Black Sea coast.

Kharkiv Mayor Ihor Terekhov said the attacks early Thursday targeted one of the most crowded areas of the city, which had a prewar population of about 1.4 million.

“The Russian army is randomly shelling Kharkiv, peaceful residential areas. Civilians are being killed,” Terekhov said.

“People started working little by little, they came out to sell things, and residents came here to buy things,” said Volodymyr Tymoshko, head of the National Police in the Kharkiv region. “And exactly this place was hit by Uragan rockets with cluster bombs to maximize the damage to people.”

The Kharkiv regional governor, Oleh Syniehubov, said four people were in grave condition and a child was among those wounded in the shelling. Russian forces also shelled wheat fields, setting them on fire, he said.

Elsewhere, Russian forces shelled the southern city of Mykolaiv overnight as well as the eastern cities of Kramatorsk and Kostiantynivka, where two schools were destroyed, Ukrainian officials said.

The scattered attacks illustrate broader war aims beyond Russia’s previously declared focus on the Donbas region’s Donetsk and Luhansk provinces, which pro-Moscow separatists have partly controlled since 2014.

Foreign Minister Sergey Lavrov told Russian news outlets on Wednesday that Russia plans to retain control over more territory, including the Kherson and Zaporizhzhia regions in southern Ukraine. Moscow also envisions making gains elsewhere, Lavrov said.

Analysts from the Institute for the Study of War, a think tank based in Washington, said the Russian offensive in Donetsk was likely to stall before reaching the cities of Sloviansk and Bakhmut. “Russian troops are now struggling to move across relatively sparsely settled and open terrain. They will encounter terrain much more conducive to the Ukrainian defenders,” their assessment said.

Richard Moore, head of the British foreign intelligence agency MI6, had a similar take, saying the Russians “are about to run out of steam” in Ukraine.

“They will have to pause in some way, and that will give the Ukrainians opportunities to strike back,” Moore said.

He said it is important for Ukraine to demonstrate its ability to respond militarily to Russia, both to maintain morale and as “an important reminder to the rest of Europe that this is a winnable campaign by the Ukrainians, because we are about to go into a pretty tough winter.”

Ukraine’s military reported Thursday that Russian forces attempted to storm the Vuhlehirska power station in the Donetsk region, but said “Ukrainian defenders made the enemy resort to fleeing.” (ap/ez)