The details of the two rapes emerged only over the past week.
Details of the rape and murder of an eight-year-old Muslim girl in Jammu and Kashmir state also made national headlines.
A lawmaker from India's ruling party was arrested on Friday in connection with the rape of a teenager, police said, after days of protests by activists accusing authorities of failing to investigate the case and other attacks.
The accused include a local priest and police officers.
Backed by a right-wing Hindu nationalist group called the Hindu Unity Council, the state bar association is now demanding that the Central Bureau of Investigation (CBI) take over the case.
In a freakish sequence of events, the girl's father died in police custody last week, fanning suspicion that Sengar was somehow involved.
On Monday, a mob of lawyers tried to block the police from entering a courthouse in northern India to prevent them from filing a charge sheet, which implicates eight men in the rape and murder of 8-year-old Asifa Bano. Her raped and mutilated body was found in the woods a week later.
The monument was the scene of protests more than five years ago following the 2012 gang-rape and murder of Jyoti Singh, a student who came to be known as Nirbhaya - Hindi for fearless - whose death galvanised a national movement against sexual assault.
"India simply can not continue to treat its women the way it does", he said.
Among the protesters in New Delhi was 37-year-old professional, Aditi Sengupta.
Indian women shout slogans during a protest against recent incidents of rape, in Ahmadabad, India, on April 13, 2018.
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The pundits said it was impossible for us to drop points but in one week we lost three games. 'You judge results, ' he added. He admitted that Sunday's game against Spurs would be another hard game for his side.
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Police only brought a case against the powerful politician last week after the young victim attempted to burn herself alive outside the state leader's residence. Modi finally addressed the alleged crimes on Friday evening, telling an event in Delhi they "cannot be part of a civilised society". "Our daughters will definitely get justice".
Two state ministers from Modi's BJP - Choudhary Lal Singh and Chander Prakash Ganga - resigned after attending a controversial rally by local Hindu groups held in defence of the accused. Dutta even washed the clothes Asifa was wearing at the time of her death to remove any blood or semen stains, the charge sheet said. Policemen who fail to register rape complaints are liable to be jailed for up to two years.
The politics over a child's rape and killing has upset numerous area's Hindu residents too.
India registered about 40,000 rape cases in 2016, up from 25,000 in 2012, government data show.
Police have suspended several officers in Unnao over the past few days pending investigations into their conduct, another senior police official said.
"[They] took him to the police station and put him in jail", the teen said. "To hold the police accountable has been a perennial problem, and not just with rape", Ms Bajoria said. A police constable and a sub-inspector were also arrested after the crime branch found they allegedly tried to destroy evidence after the crime.
Ministers have insisted that justice will be done no matter who committed the crime, while defending the government's record on fighting violence against women.
James Huang, chairman of the Taiwan External Trade Development Council (TAITRA) told India media persons visiting Taipei said, "India is important to us in terms of trade and investment".