Lashkar-e-Taiba operative David Headley, a key accused in 26/11 Mumbai attacks, continues to be grilled by a four-member team of Indian investigators in Chicago. The National Investigation Agency (NIA) team, led by Loknath Bahera, has been questioning Pakistani-American Headley face-to-face, eliciting information about his role in the Mumbai attacks, the wider conspiracy and all thoseinvolved in the carnage. The interrogation is expected to shed more light on the LeT's plans regarding terror attacks in India. The questioning of 49-year-old Headley, currently being held in the federal lock-up Metropolitan Correctional Centre, revolved around the places he had visited in run up to the Mumbai terror attacks of November 2008 and the people he had been in touch with. The team is coordinating with its American counterparts with regard to the investigation. Sources told PTI that the team will return home next week and compile a report on the basis of which further steps will be taken.