Russia's authorities and regional governors are racing to assure residents there are no fuel shortages amid an intensified Ukrainian drone campaign at Russian refineries and fuel supply roads. Ukraine has stepped up attacks this month on key fuel supply routes in its territories occupied by Russia, including Crimea and Mariupol. Several Russian regions have been experiencing fuel shortages as Ukraine hits Russian oil refineries. Last week, the Moscow Times reported that some gasoline stations in Moscow and regions in northern Russia have started…