According to primary investigations, the victim, a class 5 student, was gangraped twice or thrice in the last three months. She was last raped on November 12, Jehangirabad police station's Inspector Preetam Singh Thakur told PTI.
The watchman, Nanhu Lal, Gokul Panwala (45) and Gyanendra Pandit (36) allegedly raped the girl in the house of one Suman Pandey (50), who has also been apprehended, he said.
The girl's mother had registered a complaint with the police yesterday, the officer said.
Thakur said the accused, who lived in the same locality of the girl, had threatened the victim of dire consequences if she revealed the incident to anyone.
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According to police, Pandey used to lure the girl with sweets.
On the basis of the complaint, a case was registered under relevant sections of the IPC, including 376D (gangrape), and provisions of the Protection of Children from Sexual Offences Act (POCSO), he said.
While Panwala runs a betel (pan) shop, Pandit is a driver, Thakur said, adding Pandey works as a domestic help.
The incident comes days after a woman was allegedly raped by four men for nearly three hours near the railway tracks in Bhopal when she was returning home after attending a coaching class on October 31.