Ukraine's sustained campaign of drone attacks on Russian-occupied territories is disrupting Moscow's supply lines and intensifying a fuel crisis already triggered by long-range strikes on Russia's oil refineries. Crimea - which Russia illegally annexed in 2014 - in particular has been experiencing serious logistical difficulties and shortages. Many of the issues stem from recent Ukrainian strikes on a key motorway and bridge linking the southern Russian city of Rostov to Crimea via the occupied