Without naming Lashkar-e-Taiba founder Hafiz Saeed, High Commissioner T C A Raghavan said India was "deeply concerned that people we believe are in some ways responsible (for the Mumbai attacks) had a very wide altitude of activity in Pakistan".
"We are deeply concerned about the lack of any progress in the Mumbai case. The Mumbai case must be recognised as very important in terms of Indian public sentiment," he said.
"The difference is that the links between the information, intelligence and evidence are much more clearly established than has ever been the case in South Asia, in at least as regards to a terrorist attack," Raghavan said while speaking at a function in a think tank here.
India recorded conversations between the terrorists and their handlers in Pakistan even as the attacks were taking place, he said.
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Raghavan's remarks came on a day when a Karachi-based port worker, who had seen 10 LeT terrorists leave in a boat hours before the attacks, was cross-examined for the second day in an anti-terrorism court conducting the trial of seven suspects, including LeT commander Zakiur Rehman Lakhvi.
"The witness was cross-examined and we are not happy with his answers. He could not reply to our questions about Amjad Khan," defence lawyer Riaz Akram Cheema told PTI after the hearing held at Adiala Jail in Rawalpindi for security reasons.