SLOVIANSK, Ukraine (AP) — Russia on Thursday pulled back its forces from a Black Sea where they have faced relentless Ukrainian attacks, but kept up its push to encircle the last bulwark of Ukraine’s resistance in the eastern province of Luhansk.

Russia’s Defense Ministry said it withdrew its forces from the Zmiyinyy (Snake) Island off Ukraine’s Black Sea port of Odesa in what it described as a “goodwill gesture.” It added that the pullout has demonstrated that “the Russian Federation wasn’t hampering the United Nations’ efforts to establish a humanitarian corridor for taking agricultural products from the territory of Ukraine.”

Ukraine and the West have accused Russian of blockading Ukrainian ports to prevent the exports of grain, contributing to the global food crisis. Russia has denied the accusations and charged that Ukraine needs to remove sea mines from the Black Sea to allow safe navigation.

Russia took control of the island in the opening days of the war in an apparent hope to use it to control the area and use it as a staging ground for an attack on Odesa. The Ukrainians have continually attacked the Russian forces stationed there.

Meanwhile, in the east, Moscow kept up its push to take control of the entire Donbas region from Ukraine, which is focused on Lysychansk, the last remaining Ukrainian stronghold in the Luhansk province. Russian troops and their separatist allies control 95% of Luhansk and about half of Donetsk, the two provinces that make up the mostly Russian-speaking Donbas.

The Ukrainian General Staff said that the Russian troops were shelling Lysychansk and clashing with Ukrainian defenders around an oil refinery on the edge of the city.

Luhansk Gov. Serhiy Haidai said that Russian reconnaissance units tried to enter Lysychansk Wednesday, but were repelled by the Ukrainian forces. He said the Russians were trying to block a highway used to deliver supplies and fully encircle the city.

“The Russians have thrown practically all their forces to seize the city,” Haidai said.

Speaking on a visit to Turkmenistan early Thursday, Russian President Vladimir Putin said his goals in Ukraine haven’t changed since the start of the war. He said they were “the liberation of the Donbas, the protection of these people and the creation of conditions that would guarantee the security of Russia itself.” He made no mention of his original stated goals to “demilitarize” and “de-Nazify” Ukraine.

He denied Russia had adjusted its strategy after failing to take Kyiv in the early stage of the conflict. “As you can see, the troops are moving and reaching the marks that were set for them for a certain stage of this combat work. Everything is going according to plan,” Putin said at a news conference in Turkmenistan.

In central Ukraine, funerals were to be held Thursday for some of the 18 people confirmed killed by Monday’s Russian missile strike on a busy shopping mall in Kremenchuk. Crews continued to search through the rubble in search of another 20 people who remain missing.

Ukrainian State Emergency Services press officer Svitlana Rybalko told The Associated Press that along with the 18 bodies, investigators found fragments of eight more bodies. It was not immediately clear whether that meant there were more victims. A number of survivors suffered severed limbs.

After the attack on the mall, Ukrainian President Volodymyr Zelenskyy accused Russia of becoming a “terrorist” state. On Wednesday, he reproached NATO for not embracing or equipping his embattled country more fully.

“The open-door policy of NATO shouldn’t resemble old turnstiles on Kyiv’s subway, which stay open but close when you approach them until you pay,” Zelenskyy told NATO leaders meeting in Madrid, speaking by video link. “Hasn’t Ukraine paid enough? Hasn’t our contribution to defending Europe and the entire civilization been sufficient?”

He asked for more modern artillery systems and other weapons and warned the NATO leaders they either had to provide Ukraine with the help it needed to defeat Russia or “face a delayed war between Russia and yourself.”

In southern Ukraine, the death toll from Wednesday’s Russian missile strike on an apartment building in Mykolaiv rose to six, according to Gov. Vitaliy Kim. Another six people were wounded. Mykolaiv is a major port and seizing it — as well as Odesa farther west — would be key to Russia’s objective of cutting off Ukraine from its Black Sea coast.