Officials warn that Russian forces are preparing an attack in southeastern Ukraine. As Ukraine repulsed Russian troops in recent days – taking back territory, including areas around the capital Kiev – the NATO chief warned that Russia was regrouping and planning to deploy troops to eastern and southern Ukraine for a “critical phase.” . ” MORE PHOTOS FROM THE UKRAINE-RUSSIA WAR IN BUHA, DESTRUCTION IN MARIOPOLI “Moscow is not abandoning its ambitions in Ukraine,” NATO chief Jens Stoltenberg said on Tuesday. “We expect a further impetus in eastern and southern Ukraine to try to take over the whole of Donbas and build a land bridge” on the Crimean peninsula annexed by Russia in 2014. Russian-backed separatists in Donbas are fighting the Ukrainians troops for the last eight years. Stoltenberg also insisted that the alliance was ready to help Ukraine with military equipment, a day after President Volodymyr Zelenskyy called for more weapons. Zelensky addressed the most powerful body of the United Nations, the Security Council, on Tuesday, following the appearance of more horrific evidence of the massacre of civilians. SEVEN HUMANITORIAN CORRIDORS OPENED FOR THE RESIDENTS OF EMERGENCY MARIOPOLIS: DEPUTY PRIME MINISTER The bodies of at least 410 civilians were found around Kyiv and a “torture chamber” was discovered in Bucha. Satellite images from Maxar Technologies showed that many of the bodies had been on the streets for weeks. The New York Times first reported images showing the dead. President Biden has said that Russian President Vladimir Putin should be tried for war crimes. More than 4 million Ukrainians have fled the country since the attack began and more than 7 million have been displaced inside Ukraine, according to the UN CLICK HERE TO RECEIVE THE FOX NEWS APPLICATION Russia has denied the allegations in a statement issued Friday stating “Similar, baseless allegations concerning Russia’s nuclear program have been made more than once. The Associated Press contributed to this report.