Ink was thrown on Aam Aadmi Party MP Sanjay Singh in Hathras on Monday when he was leading a party delegation to the village of the Dalit woman who recently died after being allegedly gang-raped.
When Singh was about to speak to mediapersons from TV news channels, a man threw ink on his white kurta while shouting "PFI dalal wapas jao".
The Popular Front of India, an alleged radical group, has been accused of funding some protests against the Citizenship (Amendment) Act that took place across the country earlier this year. The UP Police had earlier sought a ban on the organisation.
Singh sat in his car and left the spot immediately after the incident.
Visuals of the occurrence went viral on the electronic media.
Singh is among the several political leaders who have visited Hathras to meet the family members of the 19-year-old Dalit woman who died on September 29 after she was allegedly raped by four upper caste men.
