Maharashtra Home Minister Anil Deshmukh on Friday requested Narcotics Control Bureau (NCB) to investigate the drug connection of actor Vivek Oberoi and filmmaker Sandip Ssingh. "Bengaluru Police have come here to probe drug connection of Vivek Oberoi and filmmaker Sandip Ssingh. But NCB is not taking up the investigation. We will request NCB to investigate the drug connection and if they don't, Mumbai Police will do it," said Deshmukh. Meanwhile, the City Crime Branch (CCB), Bengaluru has served notice to actor Vivek Oberoi's wife Priyanka Alva Oberoi over links with brother Adithya Alva in connection with the Sandalwood drug case, the concerned officials said on Friday.