An increased level of chlorine air concentration was detected in the western city of Ternopil following a Russian missile attack against an industrial facility on Aug. 20, authorities said. Russia carried out the attack overnight, with a fire breaking out in a fuel and lubricant warehouse in an unspecified facility at 3 a.m. No casualties or injuries have been reported as a result of the strike. Oksana Chaichuk, the head of the regional Center for Disease Control and Prevention, warned Ternopil’s residents to limit exposure to open air and close windows. “With a norm of 0.1 milligrams (of chlo…