Bollywood stars Deepika Padukone, Shraddha Kapoor and Sara Ali Khan were questioned by India's narcotics agency on Saturday as part of a widening investigation linked to the death of actor Sushant Singh Rajput. Padukone, who featured in Hollywood film xXx: Return of Xander Cage, is the most high-profile star to be quizzed by India's Narcotics Control Board (NCB).