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Expletives and abusive tweets were posted on the handle. One of the tweets said that a "full dump" of Congress emails will be posted.
"...Stay tuned for Christmas special. We have enough info to drop your party down to shreds," it said.
"For every retard out there who thinks we have a political agenda - No, we don't," one of the tweets read.
"Corrupt political party trying to (expletives) around with innocent hackers, you think you're cool bro?"
"Remember, we are legion, do not (expletives) with us!" it added.
Congress said the hacking exposed the vulnerability of cyber security and digital platforms. It also said it's an eye opener for Prime Minister Narendra Modi.
The party had filed a complaint with the cyber cell of Delhi Police on Wednesday night after Rahul Gandhi's twitter account was hacked.
Congress Communication Department in-charge Randeep Singh Surjewala in his reaction said: "First @OfficeOfRG and now @INCIndia hacked by lumpen fascists. Free speech and right to disagree in India is under attack by licensed trolls."
"Such despotic and vulgar attempts reflect the extremities of an intolerant culture that resorts to abuse when cornered and left answer less," added in his tweet.
Surjewala said Congress has fought "such hatred and animosity with Gandhian compassion and tolerance. Sabko Sanmati dey bhagwan (in hindi)".
He said that the cyber bullying should be "An eye opener for Modiji!"
On Wednesday, the hackers also removed Rahul's profile picture and changed the account title from @OfficeOfRG to Retarded gandhi.
The Congress said it smacked of "sinister conspiracy and reflected disturbing insecurities of prevalent fascist culture".
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)