Police, however, clarified that the incident, which happened late on Monday night, had nothing to do with "cow vigilantism" as suspected.
A mob of "gau rakshaks" allegedly beat up two Dalits in East Godavari district.
Congress members demanded that the prime minister should speak on the issue in the House rather than "tweet". They staged a walkout later.
Modi and Shah can't afford to lose any of the 24 per cent Dalit vote of 2014, says Shekhar Gupta.
Rajnath says incidents of atrocities against Dalits have come down since the Modi government took over.
Cutting across party lines, members in Lok Sabha highlighted the cases of atrocities being committed on Dalits in various parts of the country and demanded steps to prevent them.
'It is very hard to get the police to file a report against someone from an upper caste.' 'Things are so bad that sometimes we have to sit on a dharna with the body of a Dalit victim to get the police to file a complaint.'
The protesters blocked roads in several areas of Mumbai, forced shops to shut down.
'Modi is the first BJP leader to try to include Dalits in its fold.' 'But the rank and file of his party is backward and want to bash up Muslims and Dalits whenever they have a chance.'
According to the FIR lodged on Monday in connection with the incident that took place in Kasor village of Sojitra taluka, around 15 men from Rajput community thrashed the 22-year-old man and his 45-year-old mother on Saturday night, while accusing them of defying the rules for skinning the dead cattle.
The Opposition in Rajya Sabha on Thursday launched a frontal attack on the Bharatiya Janata Party over growing attacks on Dalits and other sections, saying a "Taliban-like attitude" was prevailing in some parts of the country and the 'Gujarat model' had been thoroughly exposed.
'The brazen politics, in this series of bullying of AMU by functionaries of the Union and provincial governments, utterly disregarding the fact that the matter is sub judice, is quite obvious.' 'One needs to see through the desperate politics of the BJP which governs both Uttar Pradesh and the Centre, especially its woes over its Dalit support base,' says AMU Professor Mohammad Sajjad.
'If PM has some concrete information against gau rakshaks then he must disclose it, otherwise we will take legal action against him.'
Arvind Kejriwal exhorted all community members to unite in the fight against Gujarat BJP's "oppressive" regime.
'Atrocity on Dalits get political support.'
Gujarat legislator Jignesh Mevani on Monday alleged that his arrest by the Assam police is a pre-planned conspiracy "designed" by the Prime Minister's Office to destroy him ahead of assembly elections in the state and termed it an act of "56-inch cowardice".
Sparks are expected to fly in Parliament on Wednesday as the Congress looks set to target the government on the issue of violence against Dalits.
'It is very interesting that the RSS is sending sadhus to Una.' 'They will again talk about Hindu unity to woo the Dalits.'
Catch all the latest debates and discussions being held during the Monsoon session.
In Lok Sabha, the Opposition demanded action against cow vigilantes.
'The viral video from Una aroused something that Hindu chauvinists and cow-botherers never take into account: Numbers.'
'The BJP will be wiped out in rural Gujarat.' 'In urban areas, its tally may come down from 55 of the 60 urban seats it won in 2012 to 35 to 40 seats this time.'
Rediff.com compiles a list of recent incidents where some people, mainly belonging to the upper castes, took the law into their hands to punish those who allegedly slaughtered or transported cows.
The BSP chief alleged that Modi and the ruling Bharatiya Janata Party considered the Dalits as lowly.
'Dalits are not going to vote for the BJP in 2019.'
"Thirteen years of Modi rule, not two years of Anandiben are responsible for Gujarat burning. Sacrificing the scapegoat won't save the BJP," Gandhi said on his official Twitter handle.
'He is a BJP man among Dalits, not a Dalit man in the BJP.'
He says there was tension in the area even prior to January 1.
'Who will vote for and against who will be clear once the election results are declared on December 18.'
Kejriwal, the Delhi chief minister who has set his eyes on the western state, said it was the "triumph" of AAP's fight against corruption in Gujarat.
'The Constitution, which talks about democracy and equality, is something that will be applied in this country, and not Manusmriti in which the RSS believes.'
The home minister said eight people were killed -- six in Madhya Pradesh and one each in Uttar Pradesh and Rajasthan, during Monday's Bharat Bandh.
As counting is underway in Gujarat and Himachal Pradesh, we take a look at who's leading and who's trailing.
'The continuing crisis in agriculture, the inability of successive governments to provide secure jobs to millions of youths having varying degrees of skills, and fragmentation of politics have created a sense of despondency.'
She said the BJP needs a fresh face in the state before the 2017 elections.
The Congress won 77 seats or 42% of seats in the 2017 polls. How then can Gujarat be called a BJP bastion, asks Sanjeev Nayyar.
A recap of moments captured in India in the past 24 hours.
While other parliamentarians were locked into heated debates over the Gujarat Dalits' protests, Rahul could be seen taking a power nap.
'Despite living in a free nation for so many years, if atrocities like rapes, public flogging, social boycotts are faced by Dalits, then conversion is the only option.'
The Opposition also asked the Prime Minister's Office to probe the incident, calling it "shameful.