Martand Prakash Singh said a detailed probe is on into the matter and two more police teams have been formed to nab the accused.
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Police said they have arrested the accompanying friend of the key accused, and a manhunt is underway to nab him.
Ranjit, along with his mother, reached Baradari police station with nails drilled in his hand and foot, and blamed the police.
The main accused in connection with the death of a 17-year-old boy in Bangarmau in Uttar Pradesh's Unnao district has been arrested.
Minor girl in Uttar Pradesh commits suicide after neighbour posts her objectionable photos, videos online
The accused had been absconding since the filing of the complaint and was arrested on Monday, Circle Officer Archana Singh said.
Man held for hacking brother and sister-in-law to death, chopping off one-year-old nephew's limbs in UP
Kajiyana resident Naushad said his elder brother was an alcoholic and due to this there were frequent disputes in the house.
Man hacks brother, sister-in-law to death, chops off one-year-old nephew's limbs: Uttar Pradesh Police
A man hacked his brother and sister-in-law to death with a butcher's knife and chopped off the limbs of their one-year-old child in Bhadohi.
A 14-year-old Dalit girl hanged herself at her home in Ballia district allegedly following harassment by a youth of her village.
When a 10-year-old girl was going to get wood in a village under the Jalalabad police station, the boy took her to a drain and raped her.
Sahid Hasan disappeared soon after his conviction and before his sentencing by a court in the rape case 25 years ago, police said.
When other family members tried to save her, five of them, including two women and three children, were also beaten up, the police officer said.
Under the NSA, one can be detained without a charge for up to 12 months if the authorities are satisfied that the person is a threat to national security or law and order.
Two men were arrested in Kaushambi on Sunday in connection with the alleged gang-rape of a girl, police said.
As the team took Imlakh into custody, some villagers showed up and attacked the police personnel and freed the criminal who remains at large, police said.
Uttar Pradesh Police on Wednesday arrested a man from Himachal Pradesh in connection with the alleged rape and murder of a 13-year-old girl in Bulandshahr.