Supporters of yoga guru Ramdev clashed with Congress workers outside the All India Congress Committee office at 24, Akbar Road on Monday afternoon.
According to eyewitnesses, at least 25 protestors reached the party headquarters around 4.30 pm carrying a banner of Yuva Bharat Kisan Panchayat with a picture of Ramdev on it.
They shouted slogans against Congress chief Sonia Gandhi and leaders Rahul Gandhi and Digvijaya Singh and said they would not allow anyone to defame religious leaders.
"'Sadhu santo ka apman nahi sahega Hindustan' is what they were shouting'," an eyewitness said. Some of the protesters then threw black ink on a poster that had Sonia Gandhi's image on it.
"At least 20-25 supporters of Baba Ramdev went to 24, Akbar Road, and threw black paint on a poster that had Sonia Gandhi's photo. They also raised anti-Congress slogans. Narendra from Kanjhawala and Tri Bhuwan from Mehrauli have been detained at Tughlak Road police station," a Delhi Police spokesperson said.
The protest came two days after Kamran Siddiqui, who runs an NGO in Jamia, threw ink on Ramdev during a press conference when the yoga guru ignored his question on the Batla House encounter.
An eyewitness said that when the supporters started shouting slogans, a few Congress workers had heated arguments with them, which later turned into a scuffle.
"They started beating each other and we had to intervene to bring the situation under control," a senior police officer said. Anna Hazare has condemned the incident.