Ukraine’s ramped-up attacks on Russia's oil sector this year had led to production cuts and shortages, highlighting improved tactics and successes for Kyiv.

Ukrainian drone strikes on refineries, depots and pipelines. Tanker trucks attacked and left ablaze along the land corridor from Russia to Crimea. Motorists waiting in long lines…

Ukraine's drone strikes on Crimean fuel supplies trigger a severe crisis, challenging Russia's control and impacting tourism on the peninsula.