An explosion in a residential building in Russia's western Tula region has killed at least five people. Emergency Department officials in the town of Yefremov said on February 7 that rescue teams continue to look for survivors or bodies at the site. According to the authorities, the explosion was caused by a gas leak and destroyed three levels of a five-story building. Gas explosions frequently occur across the former Soviet Union due to aging pipelines and infrastructure, as well as lax safety standards.