India's Supreme Court has allowed an Italian marine involved in the shooting deaths of two Indian fishermen in 2012 to stay in Italy until April 30.

Marines Massimiliano Latorre and Salvatore Girone were assigned to anti-piracy duty aboard an Italian oil tanker off India's coast at the time of the shootings. Latorre was allowed to travel home for medical treatment in September after suffering a stroke.

The Supreme Court asked the Indian government on Wednesday to explain how long it will take for an arbitration panel to rule on the bilateral dispute, and also asked Italy to explain how long Latorre's treatment would take.

Italy argues that the shooting occurred in international waters and the case should be heard in an Italian court. New Delhi insists it has jurisdiction.