Ukraine told residents of its industrial heartland to leave while they still can and urged Western nations to send “weapons, weapons and weapons” Thursday after Russian forces withdrew from the shattered outskirts of Kyiv to regroup for an offensive in the country's east. Russia's six-week-old invasion failed to take Ukraine's capital quickly and achieve what Western countries say was President Vladimir Putin's initial aim of ousting the Ukrainian government. Russia's focus is now on the Donbas, a mostly Russian-speaking region in eastern Ukraine. In Brussels, Ukrainian Foreign Minister Dmytro Kuleba urged NATO to provide more weapons and help his war-torn country prevent further alleged atrocities. Ukrainian authorities are working to identify hundreds of bodies found in Kyiv's northern outskirts after Russian troops withdrew and to document evidence of possible war crimes. “My agenda is very simple. ... it's weapons, weapons and weapons,” Kuleba said as he arrived at NATO headquarters for talks with the military organization's foreign ministers. “The more weapons we get and the sooner they arrive in Ukraine, the more human lives will be saved," he said. While NATO is striving to avoid actions that might draw any of its 30 members into a war with Russia, Secretary-General Jens Stoltenberg urged nations that belong to the Western alliance to send Ukraine more weapons, and not just defensive arms. Western countries have provided Ukraine with portable anti-tank and anti-aircraft weapons, but they have been reluctant to supply aircraft, tanks or any equipment that Ukrainian troops would have to be trained to use.