KYIV, Feb 15 - Ukraine’s Donetsk and Luhansk regions, which together make up the industrial Donbas region bordering Russia, continue to bear the brunt of Russia’s bombardments as Moscow reportedly moves more troops into the area.

In Luhansk, the number of Russian ground and air attacks is “growing every day,” Gov. Serhii Haidai said on Ukrainian TV, The Associated Press reported.

“The Russians were able to transfer new forces for the offensive and now they are trying to overwhelm us with sheer human mass,” Haidai said.

Donetsk Gov. Pavlo Kyrylenko said Wednesday that one town had come under “nonstop” fire from multiple rocket launchers for over three hours the previous day that damaged at least 12 residential buildings.

At least 12 civilians were wounded when Russian forces struck a five-story apartment block in the city of Pokrovsk, Kyrylenko said. Two others remained under the rubble.

Meanwhile, Kyiv’s military administration said that six apparent reconnaissance balloons were detected floating over the capital on Wednesday. Ukrainian air defense systems shot down “most of” them, an online statement read, adding that the balloons “could carry corner reflectors and certain reconnaissance equipment” and were designed to “identify and deplete” Ukraine’s air defenses.

The statement promised more details about the objects following “a detailed study and analysis.”

With the one-year anniversary of Russia’s war approaching, followed by improved spring weather, Western officials and analysts say the fighting could be nearing a critical phase when both sides look to launch offensives.

The Kremlin is striving to secure eastern areas it illegally annexed in September — the Donetsk, Kherson, Luhansk and Zaporizhzhia regions — and where it claims its rule is welcomed. Pro-Moscow separatists have controlled part of Donetsk and neighboring Luhansk province since 2014.

“The enemy, trying to take full control of the Donetsk and Luhansk regions, continues to focus his main efforts on conducting offensive operations in the Kupiansk, Lyman, Bakhmut, Avdiivka and Shakhtarsk areas,” the Ukrainian military reported, referencing towns in the two provinces as well as on the eastern edge of the neighboring Kharkiv region.

Kyiv’s continued defense of Bakhmut, a Donetsk province mining town that for months has been a key target of Russia’s campaign in the east, has been “strategically sound” because it sapped Moscow’s momentum, a U.S. think tank said.

Kyiv’s defense has “degraded significant Russian forces,” including units from the Wagner Group, a Russian private military contractor, the Institute for the Study of War said late Tuesday. (ap/ez)