KYIV, Ukraine (AP) — Ukrainian forces struck a major natural gas processing plant and two key satellite communications centers in their latest nighttime attacks on Russia, Ukraine's General Staff said Wednesday.

The operation was part of Ukraine's aerial campaign targeting energy facilities and military industries that has intensified as Kyiv builds bigger and better long-range weapons to ward off Russia's full-scale invasion, now in its fifth year.

READ MORE: Ukraine and Russia exchange deadly strikes, with at least 1 child killed in Sumy

In response, Moscow has ordered the redeployment of some air defense systems from Russian regions to the capital and to Crimea's Kerch Bridge, a crucial transport link for supplying Russian troops, Ukrainian President Volodymyr Zelenskyy said. The bridge connects the Crimean Peninsula with the Russian mainland.

"It is important that as many Russians as possible come to understand that it is the Russian leadership's rejection of diplomacy that is prolonging the war," Zelenskyy said on X.

Zelenskyy has accepted an unconditional ceasefire demanded by U.S. President Donald Trump but Russian President Vladimir Putin has refused.

Ukraine says the stricken gas plant was one of the world's largest

The overnight attack hit the Orenburg Gas Processing Plant, which is part of a complex that also houses the only helium plant in Russia, the General Staff said in a statement on the Telegram messaging app. The attack set the complex on fire, it said.

Orenburg, in the southern Urals near Russia's border with Kazakhstan, is more than 1,200 kilometers (750 miles) behind the front line in eastern and southern Ukraine.

The plant is one of the largest gas complexes in the world, according to the General Staff. It produces helium, used in liquid-fuel rocket engines and guidance systems, and ethane, a key component in producing solid rocket fuel and gunpowder, it added.

Overnight attacks also hit two satellite communication centers used by the Russian military, according to the General Staff.

One was the Dubna Space Communications Center near Moscow, which it described as Russia's largest ground-based satellite communications complex, and the other was in the Vladimir region east of the capital.

It was not possible to independently verify the General Staff's report, and Russian officials made no immediate comment.

The General Staff's statement did not say whether the military used drones or missiles in the assault, but drones have recently been used to strike Moscow and St. Petersburg.

Ukraine continues to hammer Crimea

Ukraine has recently focused its drone and missile attacks on Crimea, aiming to cut off the vital Russian-held peninsula, and overnight drone strikes knocked out power in Sevastopol, Mikhail Razvozhayev, the city's Moscow-installed governor, said Wednesday.

Crimea, which was illegally annexed by Russia in 2014, sits in a strategic location on the Black Sea. It has naval bases and also provides an important supply line to Moscow's forces inside Ukraine.

READ MORE: What to know about Crimea, the peninsula Russia seized from Ukraine in 2014

Ukraine recently destroyed more than 60,000 tons of Russian ammunition when it hit a Baltic Fleet arsenal near St. Petersburg, Zelenskyy said.

Ukraine is trying to disrupt military supply lines in Crimea and strike the peninsula's power grid at the height of the summer tourist season. Kyiv hopes the campaign will embarrass Putin and increase public pressure on him to end the war, according to Western analysts.

Ukraine's Security Service said Wednesday it struck two military airfields and destroyed missile systems in Crimea.

Drones kill at least 3 in Russia and 2 in Ukraine

Russian forces shot down 323 Ukrainian drones overnight, Russia's Defense Ministry said.

Two people were killed and two others wounded overnight in a Ukrainian drone strike on Russia's Nizhny Novgorod region, east of Moscow, regional Gov. Gleb Nikitin said. Also, a Ukrainian drone strike killed one person overnight in Russia's Belgorod border region, bordering Ukraine, local officials said.

Ukraine's air force, meanwhile, said Russia launched 101 long-range attack drones overnight.

Russian drones attacked the city of Balakliia in northeastern Ukraine, killing a 56-year-old woman, according to Oleh Syniehubov, head of the Kharkiv regional military administration. Also, a 57-year-old streetcar driver man died as a result of a Russian guided aerial bomb that hit the outskirts of Sumy, said Oleh Hryhorov, head of the regional military administration.

Elise Morton in London contributed.