LONDON, Oct 11 (Reuters) - The governor of Russia's Belgorod region said on Tuesday that more than 2,000 people had been left without power after Ukraine shelled an electricity substation in the town of Shebekino, on the border with Ukraine's Kharkiv region.In a post on Telegram, Governor Vyacheslav Gladkov said that emergency services were working to restore the power supply.Register now for FREE unlimited access to Reuters.comOur Standards: The Thomson Reuters Trust Principles."