Those arrested included a Kerala journalist, Siddique Kappan, who has not filed any bail application so far.
The victim in the Hathras case and her family were treated badly by the Uttar Pradesh government, Priyanka Gandhi alleged.
A 19-year-old Dalit woman was allegedly raped by four men in Hathras on September 14. She died on September 29 at Delhi's Safdarjung Hospital during treatment.
A 19-year-old Dalit woman was allegedly raped by four upper-caste men in Hathras on September 14.
CBI also summoned inspector DK Verma, the suspended in-charge of Chandpa police station under which Boolgarhi village falls, for further questioning.
While another team interrogated the Hathras doctor, a thid team grilled a youth who claimed to be an eyewitness to the alleged presence of the victim with her mother and brother during the incident.
No SC/ST member part of CBI team probing Hathras rape case, transparency needed: Chandrashekhar Azad
Earlier in the day, Central Bureau of Investigation (CBI), re-summoned the father and the two brothers of the victim for questioning. They were questioned by the CBI team on Tuesday as well.
In its order after Monday's hearing, the Lucknow bench of the high court warned against 'character assassination' of the victim and urged restraint by officials, political parties and the media.
Though Uttar Pradesh reported highest number of crimes against Dalits in 2019, Rajasthan had maximum atrocities at 55.6%
The victim, a 19-year-old Dalit woman, was assaulted and allegedly raped by four men in Hathras of Uttar Pradesh on September 14.
Hathras victim's family to appear before Lucknow bench of Allahabad HC amid tight security on Monday
With the help of CCTV cameras, the house of the victim was being monitored round-the-clock, police said.
While the call records have indicated a probable link between the accused and the victim's family, the police have not ruled out questioning the victim’s brother on this issue.
The specialists in these fields said that the 2013 amendment in rape laws has waived the clause that had made it necessary to establish 'penetration' in crimes of rape.
The family of the two minors alleged that they were threatened not to file a complaint against the accused.
Offering condolences to the bereaved family, Samajwadi Party leader Akhilesh Yadav tweeted, "There is no expectation from today's insensitive power."