The police got information about the incident from Safdarjung hospital, where the girl was taken for treatment last night at around 11 PM, said a senior police officer.
The girl was operated upon and her condition is stated to be out of danger, doctors said. However, she is kept in Intensive Care Unit (ICU) of the hospital, he said.
The girl belonged to a poor family and her father is a hawker. Her family members suspected a neighbour's involvement in the rape.
Police have registered a case of rape and investigation has been taken up. Efforts are also being made to arrest the accused.