MOSCOW, July 30 (Reuters) - Ukrainian drones struck two more warehouses belonging to Russian online retailer Wildberries overnight, sparking fires at both sites, the company and ‌a regional official said. Oleg Melnichenko, governor of the Penza region in western Russia, said one person was injured and around 200 people were evacuated from the Wildberries site there. Several Russian news outlets reported a third attack on a Wildberries site in the Urals region of Perm, but the company said its sorting centre there was operating ​normally. The regional ​governor said Perm had come under heavy Ukrainian ​drone attack overnight. Ukraine, whose own cities ‌are under constant Russian attack, describes its strikes deep inside Russia as "long-range sanctions" designed to sap Moscow's war-fighting capacity and force it to end the 4-1/2-year conflict.