Massimiliano Lattore and Salvatore Girone, charged with homicide for killing two fishermen off the Kerala coast in February last year in an anti-piracy operation, were permitted by India's Supreme Court to go to Italy for four weeks for voting in last month's election.
Relations between Italy and India were further strained on Monday when the Italian government announced that marines Latorre and Girone would remain in Italy and not return to India to face murder charges after being allowed to come home to vote by the Apex Court.
The Supreme Court had allowed the marines to go to Italy to cast their vote in the elections there after Italian Ambassador to India Daniele Mancini had given an assurance to send them back.
Prime Minister Manmohan Singh had yesterday noted that the country is agitated over Italy's action which is "unacceptable" and said the government will pursue diplomatic channels to bring the two marines back.