The Narcotics Control Bureau is likely to investigate Karan Johar's alleged drug party, which was held in 2019. The party was attended by the who's who of Bollywood, including actors like Deepika Padukone, Vicky Kaushal, Ranbir Kapoor, Varun Dhawan, Zoya Akhtar, Shahid Kapoor and Malaika Arora, among others. The celebs can be summoned by the NCB soon.