On 15 February 2012, two Indian nationals aboard the St. Antony, an Indian fishing ship, were killed allegedly as a result of gunshot wounds following a confrontation with the Enrica Lexie, an Italian merchant ship, in international waters, off the Indian coast. The nature of the confrontation has been in contention. Enrica Lexie was traveling from Singapore to Egypt accompanied by six Italian navy marines. Enrica Lexie began firing at India's Exclusive Economic Zone because they thought pirate boats attacked them. Indian Navy detained the Enrica Lexie and two Italian navy Marines were arrested on charges of murder of two Indian fishermen. This incident caused the dispute between India and Italy over criminal jurisdiction, functional immunity of Italian navy marines, and the practice of arming merchant ships. They refer this dispute to arbitration and finally, Tribunal issued its award. This paper via the descriptive-analytical method, exploring existing documents, conventions, and customary international law shows that criminal jurisdiction over Italian merchant ships at EEZ belongs to the flag state. Most countries permit and even force to arm their flag merchant ships to fight against pirates, so this practice becomes a rule of customary international law. As a result, actions of these Italian marines are attributed to Italy as a governmental act, and state officials are entitled, in principle, to functional immunity from foreign jurisdiction regarding their ‘official’ acts, i.e., when acting in their official capacity.
