Three of the bodies, including of the man dressed like a woman, were found on Monday on a track near Ganga Vihar colony, between Gurgaon and Bijwasan railway stations.
On Tuesday, parts of a woman’s body and the body of a man in his mid-30s were also found in the same area, near the tracks.
Two of the three victims of Monday were identified as Saleem Alam (22) and Aslam Ansari (35). Alam hailed from Siwan and Ansari from Chhapra, both in Bihar.
Both electricians lived in Gurgaon on rent. The man dressed in a sari and blouse has not been identified.
Police officer Chetram said: “We are looking for the head and torso of the woman who was wearing green colour salwar.”