Four Russia-linked tankers have been attacked at sea in under a week. The tiny oil and chemicals tanker Midvolga-2 was sailing across the Black Sea to Georgia from Russia hauling sunflower oil when it was attacked about 80 miles off Turkey’s northern coast, the Transport Ministry’s Maritime Affairs Directorate said on X. Who, or what, is behind the strikes? Ukraine denies being involved. Alex Longley takes a closer look https://t.co/f3RRzvxzSO