Accusing BJP leaders, including former Union minister Rajyavardhan Rathore, of sharing "deliberately fabricated and distorted reportage" on Rahul Gandhi's comments in Kerala, the Congress on Saturday threatened to take legal action against them if the BJP fails to apologise.
Rahul Gandhi also lashed out at the BJP and the RSS, alleging that "propaganda and lies" are their foundation.
The opposition party attacked Mr Rathore and called him "shameless" after Twitter labelled a post by him on a video of Rahul Gandhi's remarks in Kerala as "media presented out of context".
In a letter to BJP chief J P Nadda, Congress general secretary in-charge communication Jairam Ramesh said he was appalled to note that several BJP leaders have been deliberately and enthusiastically sharing "mischievous reportage that occurred on Zee News at 9 pm yesterday".
The channel later issued an apology, with anchor Rohit Ranjan saying, "Yesterday, in our show DNA, Rahul Gandhi's statement was taken in the wrong context by linking it to the Udaipur incident, it was a human error for which our team apologizes."
In his letter to Mr Nadda, Mr Ramesh said the original video was of Mr Gandhi's comment on the SFI violence on his Wayanad office but it was "deliberately and mischievously doctored" to appear as if it was a comment on the heinous murder of Kanhaiya Lal in Udaipur.
It was immediately brought to the attention of all concerned that the reportage was false and deliberately misleading, he said.
"What is of even greater concern, is that several of your party colleagues, including Rajyavardhan Rathore, MP, Subrat Pathak, MP, Kamlesh Saini, MLA and others, have enthusiastically and without verification published and shared the deliberately fabricated and distorted reportage," Mr Ramesh said in his letter.
"Despite being cautioned by my party colleagues that the clip was maliciously false and misleading, Rathore persisted with amplifying the same, first deleting and then re-uploading the same," he said.
This leaves no doubt that Mr Rathore's actions were deliberate and part of your party's strategy to defame the former Congress president, the party and to further polarise an already sensitive, communal situation, Mr Ramesh alleged.
"The fact that some of your colleagues may have deleted the false reportage later after uploading and sharing is no excuse whatsoever because the damage has already been inflicted,'' he said.
"We have already initiated appropriate legal action against the original broadcaster. We expect that you and your party colleagues will cease and desist from spreading such falsehoods," Mr Ramesh said in his communication to Mr Nadda.
"Furthermore, I expect that you will immediately issue an appropriate apology on behalf of your colleagues who have acted with such reckless disregard towards the truth.
"If this apology is not issued today, we will take appropriate legal action against your party and its leaders who insist and persist in using social media in such a blatantly irresponsible and criminal manner," Mr Ramesh warned.
There was no immediate reaction from the BJP.
In an apparent reference to the issue, Rahul Gandhi in a tweet in Hindi said, "Whole India knows the history of BJP-RSS, which warms its hands by pushing the country in the fire of hatred.
"No matter how much these traitors try to break the country, the Congress will continue to do more work to unite India," he said.
The communication department head, Pawan Khera, said that those BJP leaders who have put out "fake video" of Rahul Gandhi should be ready to tour the country as they will have to make rounds of the courts of many cities.
"Doctored Shameless Rathore has this honour of being labelled by @twitter as a man who posts fake content," Mr Khera tweeted, sharing a screenshot of Twitter's flagging of Mr Rathore's post.
Congress' social media in-charge Supriya Srinate also slammed the BJP for sharing the video to mislead people and called Rathore a "fake news peddler".
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)