Kharkiv Metro briefly suspended operations on all 30 stations on the morning of April 5. Kharkiv, Ukraine’s second-largest city, has been at the forefront of Russian attacks since the beginning of the full-scale invasion and saw an escalation in strikes in recent weeks. The subway consists of three lines operating 38.7 kilometers (24 miles) of the route. Kharkiv Metro’s press service did not specify the reason. Later the same day, Kharkiv Metro’s press service reported resuming operations. A Russian attack on Kharkiv in the late evening of April 4 damaged a car repair show and windows of a nea…