Ukraine on Friday asked Turkey to detain a Russian-flagged cargo ship that Kyiv alleged had set off from a Kremlin-occupied port. Marine traffic websites showed the Zhibek Zholy anchored about a kilometre (half a mile) off Turkey’s Black Sea port of Karasu. They also showed the ship only switching on its transponders about 12 hours before approaching Turkey. Kyiv’s ambassador to Ankara said the ship had set sail from Ukraine’s Kremlin-occupied port of Berdyansk. “Based on instruction from the Ukrainian general prosecutor, we asked the Turkish side to take corresponding measures,” Ambassador Va…