Ravinder Singh, a native of Palwal in Haryana, was having a party with his friends at third floor of the building when the incident occurred last night at Sector 134, DSP Shiv Ram Yadav said.
Ravinder was rushed to the nearby hospital where he was declared brought dead, he said.
On a complaint by victim's brother, an FIR was today lodged against five persons who were with him at the time of the incident, he said, adding the body has been sent for post-mortem and the report is awaited.