The juvenile who has been caught on charges of involvement in the gang-rape and murder of the 23-year-old physiotherapy student underwent an operation for appendicitis at a city hospital over the weekend.
He is now stated to be stable.
According to sources, he was earlier kept at an observation home that is guarded by the Delhi Armed Police.
Though there were allegations that he was beaten up by inmates inside an observation home where he was earlier lodged, sources denied that he was assaulted.
His bone ossification test has not been done yet.