The protesters, led by Congress MLA from Seelampur Matin Ahmed and Hasan Ahmad's brother reached Jantar Mantar at around 1:30 PM and staged a demonstration. They shouted slogans and also burned the effigy of Shia cleric Kalbe Jawwad.
The protesters condemned the attack and alleged that it took place on the behest of Jawwad and demanded police action against him.
Police said that they had sought prior permission to stage a protest and they dispersed themselves after the demonstration.
"They (attackers) said that you are here to talk against Kalbe Jawwad (Shia cleric) and started manhandling me. They also attacked me with cold drink bottle", Hasan had told reporters after the attack.
He also said that he has lodged an FIR in this regard. When contacted, the person who picked Jawwad's phone said that he was not available.
Jawwad had recently issued an appeal not to vote for Congress.