As part of its investigations, Delhi police is all set to question Apollo Hospital chief Pratap Reddy and his aide Raji Chandru on Thursday in connection with the Rahul Mahajan drug abuse case.

Investigators also claimed they have confirmed that information regarding Rahul's admission in the hospital in the wee hours of June 2, 'was delayed by a combination of doctors and management'.

"We have questioned several junior doctors and staffers in the last few days. On Tuesday we will interrogate the team of senior doctors, which treated Rahul and probably on Thursday, we will question Pratap Reddy and his associate," a top investigator said.

An FIR was registered against Apollo on June 9 for giving false information to police officials in the case, a day after a city court directed it to take action against the premier private hospital.

Complete coverage: Rahul Mahajan case