Explosion on Gambia-Fledged Vessel Near Turkey's Coast
Turkey's Maritime Affairs agency says external impact caused the blaze; port agent suggests possible mine hit.
Kairos is a Suezmax tanker linked to Russia's shadow fleet, sanctioned by the UK and European Union.
Vessel not carrying cargo, returning to a Russian port to load.
25 crew members evacuated amid the blaze; Bosphorus trade remains open.
Previous explosions on Russian oil ships linked to Ukraine war and regional commodity flows.