Delhi Police on Sunday questioned Rahul Mahajan, son of late Bharatiya Janata Party leader Pramod Mahajan, and Sudhanshu Mittal - Pramod Mahajan's close associate - in connection with the drug abuse case.
Police said this was the first time that Rahul was called for questioning after being granted bail June 14. They said the interrogation started around 5 pm.
Rahul was arrested June 5, soon after being discharged from the Indraprastha Apollo Hospital, where he was undergoing treatment for the suspected drug overdose. He was later remanded in judicial custody June 8.
It was Mittal who had brought Rahul and Bibek Moitra, close aide of Pramod Mahajan, to the hospital June 2 after they had taken ill following an alleged drink-and-drug binge at the late leader's official residence the previous night. Moitra, however, was declared brought dead.
Police said they had found during the questioning of doctors of the hospital that Mittal had given a packet of narcotic substance to some doctors.
As many as 30 office-bearers, including doctors and medical staff, of the hospital have been interrogated.
A case was registered against the hospital June 9 for hiding vital information from the police.
The hospital had initially maintained that Rahul Mahajan's toxic screen test revealed no trace of any narcotics in his blood and urine samples. However, the Central Forensic Sciences Laboratory found traces of illegal drugs like heroin and cocaine in the blood samples of Mahajan and Moitra.