The incident came to light when the girl's 10-year-old brother reported the matter to their landlady after he saw the greasily scene this morning.
The prime suspect, was a distant relative and used to share the residence with the victims, is at large, a police official said.
The elders of the family were not present at home when the incident took place. "Her parents had gone to participate in the last rites of her grandfather," a senior police officer said.
According to police, around 6.30 AM, the girl's younger brother spotted the duo in an unconscious state and bleeding profusely. He informed the landlady who in turn made a PCR call.
"The deceased boy had a bed sheet wound around his neck while the girl was found with head injury. Also, blood was observed on her private parts leading to suspicion that she was sexually assaulted," the officer said.
