Protestors shout slogans during a protest outside UP Bhawan, in New Delhi, India. Reuters
Two demonstrators were killed and hundreds of others arrested last week in nationwide protests over the comments, which embroiled India in a diplomatic furore and caused widespread outrage in the Islamic world.
Footage of bulldozers demolishing homes of those arrested or identified as protesters has since been spread on social media.
Authorities were "selectively and viciously cracking down on Muslims who dare to speak up... against the discrimination faced by them," Amnesty's Aakar Patel said in a statement.
Police officials try to detain a supporter of All India Students’ Association during a protest in New Delhi. Reuters
"Cracking down on protesters with excessive use of force, arbitrary detention and punitive house demolitions... is in complete violation of India's commitments under international human rights law."
More than 300 people have been arrested in the northern Uttar Pradesh state for joining last week's rallies.
The state's chief minister, firebrand monk Yogi Adityanath, is one of India's most prominent Hindu nationalist politicians, known for sectarian rhetoric against India's 200-million strong Muslim minority.
Adityanath has repeatedly called on authorities to demolish the homes of people accused of crimes, an exhortation critics say violates constitutional and human rights law prohibitions on collective punishment.
Amnesty has demanded an "immediate and unconditional release" of detained protesters, and Patel said the arrests and demolitions were "part of an alarming escalation of the states' measures targeting Muslims".
A Muslim student is detained during a protest outside Uttar Pradesh house, in New Delhi. AP
Since coming to power nationally in 2014, the Bharatiya Janata Party (BJP) has been accused of championing discriminatory policies towards Muslims.
Prime Minister Narendra Modi's government proposed a controversial law that granted faster citizenship to refugees in India, but not if they are Muslim, while state BJP governments have passed laws making inter-religious marriages harder.
Cities around India saw sizable demonstrations on Friday, with some crowds burning effigies of Nupur Sharma — the BJP spokeswoman whose comments during a TV debate show set off the furore.
Sharma has been suspended from the party, which issued a statement saying it respected all religions, while the governments of nearly 20 Muslim-majority countries called in their Indian envoys to register their disapproval.
Friday also saw huge protests in neighbouring countries, with police estimating more than 100,000 people mobilised across Bangladesh after midday prayers.
Another 5,000 people took to the streets in the Pakistani city of Lahore, demanding that their government take stronger action against India over the comments.
Udupi is one of three districts in Karnataka's religiously sensitive coastal region, which is a stronghold of Prime Minister Narendra Modi's right-wing Bharatiya Janata Party (BJP).
They stopped the bulldozers just outside the entrance of a Hindu temple, about 50 metres (160 feet) from the mosque, and began to retreat, spurring outrage from Muslim residents who said they were being targeted.
Amnesty said it had uncovered proof in Kharkiv of the repeated use by Russian forces of 9N210 and 9N235 cluster bombs and scatterable land mines, all of which are banned under international conventions.
Hours after it denounced insult of any religious personalities, the BJP on Sunday suspended party spokespersons Nupur Sharma and Naveen Kumar Jindal for their comments on Prophet Mohammad (PBUH).
The children shared their immense pride in the noble legacy and selfless sacrifice of their fathers in the service of the nation.
Four months and seven countries later, he is in Cairo with a full scholarship to Al Azhar University. "If you have a dream, stay with it and be strong," Barry said. "God will help you."
The UAE has expressed its sincere condolences and solidarity with the Republic of Iraq over the victims of the fire in Nineveh province, which resulted in hundreds of deaths and injuries.