India has asked Pakistan to inform it about the steps being taken to process the requests for voice samples of all Mumbai terror attack accused, currently based in that country. Official sources said that New Delhi conveyed to Islamabad that in principle it has agreed to allow a Pakistani Commission to travel India to interview key witnesses and other officials in connection with the trial of seven Pakistani suspects in 26/11 Mumbai terror attacks case.Asking Islamabad to fulfill its obligation and commitment to bring to justice the perpetrators of the 26/11 carnage, India regretted that no feedback has been received on several issues raised by New Delhi.