In a major new development to the drugs probe into Bollywood actor Sushant Singh Rajput's suicide investigation, the Narcotics Control Bureau (NCB) have summoned Rakul Preet Singh, Deepika Padukone, Sara Ali Khan, and Shraddha Kapoor, all of whom have been asked to appear for interrogation in the next three days.

According to the officials in the anti-drugs agency, Deepika Padukone has been summoned on Friday and Rakul Preet Singh tomorrow. Sara Ali Khan and Shraddha Kapoor will be questioned on Saturday, while fashion designer Simone Khambatta will be questioned tomorrow as well. Based on a case filed by the NCB with WhatsApp messages retrieved from Sushant's girlfriend Rhea Chakraborty's mobile phone, Deepika Padukone's business manager Karishma Prakash will also be questioned on Friday in connection to the case. Rhea and her brother Showik were arrested on September 9 by the Narcotics Control Bureau in similar charges. They filed an application in the Bombay High Court seeking bail after the Special Court extended her judicial custody till October 6. Recently, a few mobile conversations involving drugs came under the NCB's scrutiny and while the initials of the individuals 'D' and 'K' were revealed initially, the people were then allegedly identified as Deepika Padukone and her manager Karishma Prakash, who is employed at the Kwan Talent Management Agency.

The NCB has arrested more than 12 people so far in connection with the drug angle in Sushant Singh Rajput's suicide. The actor was found hanging in his residence in Mumbai's Bandra on June 14.