The incident came to light after a video shot by one of the accused went viral on the social media, the police officer added.
The accused and the victim, who is stated to be out of danger, are said to be neighbours.
The victim was sexually assaulted by her neighbour in Gopabandhu Nagar under Jatni police limits of Khurda district on Thursday night.
A 19-year old student from Chaitanyapuri was arrested for sexually abusing a minor girl.
The intimidated girl kept mum until she was taken to the hospital by her mother upon finding out about her menstrual irregularities where she was found to be pregnant.
The body of the missing child was found abandoned in the narrow passage next to her house with her limbs tied and several injuries on her forehead.
It was alleged that AV Shrinath, posing as a Crime Officer had threatened a minor girl with a pistol and raped her.
The man reportedly booked an Uber costing over $800 to get the girl from her home in Texas to his parent's home in Orlando and kept her trapped for three days.
The girl approached the police along with her father and lodged a complaint on Friday, alleging that she was raped by the accused, Nagaraju (19), who promised to marry her as per the police.
The accused also beat up the girl when she resisted his moves and prevented her from meeting her parents, he said.
As per the complaint, the accused, Anurag Singh, sexually exploited the 17-year-old girl on the pretext of marrying her, Dhamajaigarh's sub-divisional officer of police Arjun Kurre said.
The 24-year-old woman was allegedly whipped, pulled by the hair, and mercilessly assaulted.
Kovalam Sub-Inspector Ajith Kumar said accused used to give financial support girl’s families and bankrolled the education of the girl and his brother.
After a foul smell emanated from the tank located underground, a farmer looked into it on Saturday and spotted the body.
'Both the minors are neighbours. As per the complaint, the boy had been raping the girl since the last four months,' an official of Mokhada police station said.