Italian Deputy Foreign Minister Stefan De Mistura met External Affairs Minister Salman Khurshid here to convey concern over the delay in the trial.
During the meeting, Khurshid expressed willingness of his ministry to facilitate "direct" interactions between the teams of the two countries to better understand their respective positions in the case, Spokesperson in the External Affairs Ministry said.
However, official sources ruled out any "out of court" settlement in the matter.
The other options include appearance through video conferencing, a visit by a team of NIA to Italy for questioning them or the investigators can send them written questions which they would reply.
The four marines, who were on board Italian vessel 'Enrica Lexie' and were present at the spot when their colleagues Massimiliano Latorre and Salvatore Girone allegedly shot dead two fishermen on February 15, 2012, were summoned by the National Investigation Agency which is handling the probe.