A case has been registered under Indian Penal Code section 302 (murder) on a complaint by the family of Kaushik, and the colleague has been detained for questioning, Sector 49 police station house officer Girija Shankar Tripathi said.
Both Kaushik and her colleague in Zee Rajasthan were reportedly inebriated at the time of the incident, an official said, adding liquor bottles were recovered from the house where a party was held Thursday night.
"The security guard of the building had alerted the police at Sector 49 police station about the incident. The colleague has told police that he had gone to her house for dinner when she accidentally toppled over the railing in the balcony of the flat," the official, who did not wish to be named, told PTI.
"The railing in the balcony is of low-height," the official said.
"We are probing the cause of death," the SHO said, adding the body has been sent for post-mortem and the report is awaited.