A marine drone struck a Turkish crude oil tanker that had departed Russia, causing an explosion in the Black Sea near Istanbul's Bosphorus strait on Thursday, Turkey's transportation minister said.The incident, one of several in recent months involving Western-sanctioned vessels heading to or from Russian ports, occurred in the early hours, minister Abdulkadir Uraloglu told broadcaster Kanal 24.All 27 crew were safe, he said, adding that the coastguard had been dispatched to the vessel…