Kolkata: The CBI on Thursday questioned TMC youth leader Ashish Pandey, who is also house staff at RG Kar Medical College and Hospital, in connection with the doctor's rape and murder case, an official said.

He said that before leaving late at night, Pandey was interrogated for hours at the CBI CGO Complex office.

"Pandey's phone number was found in the call lists of several people. On the day the trainee doctor's body was found, he had checked into a hotel in Salt Lake with a female friend. We traced his activities that day. Trying to put it in." CBI officer said.

The CBI also sought details of Pandey's booking and payments made from the hotel authorities.

"The hotel room was booked through an app. He checked in on the afternoon of August 9 and left the next morning. We are trying to find out what was the motive behind his stay there," the officer said. "

The body of a trainee doctor was found in the hospital on August 9, sparking outrage across the country.