Mogherini working to bring marines back from India
Speaks to Indian FM Khurshid07 March, 11:25
They have been in Indian custody, so far without charges, for two years apart from two trips back to Italy.
India recently took the death penalty off the table, saying the pair could face up to 10 years in jail.
Italy is seeking international arbitration on the incident, which took place in international waters off the coast of the southern Indian state of Kerala on February 15, 2012.
Premier Matteo Renzi said on his appointment last month the case was "absurd and shocking". He said the pair have been stuck "for too long" in New Delhi and has given them his personal guarantee to see them returned to Italy.