Joint Commissioner of Police Ravindra Yadav said the incident took place around 5:30 am at Pandav Nagar in east Delhi.
"The woman has alleged that she was allegedly gang-raped by five persons in a flat. She said that she came to the flat with one of the accused who is a common friend. She alleged that the accused was later joined by four of his friends and they gang-raped her. She objected and tried to get away by jumping off the balcony of the first floor apartment," he said.
Mr Yadav said the Pandav Nagar Police Station received a call from local residents reporting that a woman was lying injured on the road after having jumped from the first floor of a building.
The woman was taken to Lal Bahadur Shastri hospital "with minor injuries in her legs", he said. The accused who work in a call centre in Noida and one in a private firm were arrested.