At least 10 people were injured after an unidentified person sprayed them with a liquid at a Congress victory rally in Tumakuru on Monday. The victims are Congress supporters who were celebrating the victory of the party candidate Inayatullah Khan in urban civic body polls.

The police said no complaint has been lodged so far and no arrests were made. “Someone sprayed some liquid on the crowd,” Tumkur Superintendent of Police Divya Gopinath said according to the Hindustan Times. “The injured were taken to a hospital. The doctor said the liquid could be some low-intensity acid like a bathroom cleaner.”

The Karnataka Youth Congress denounced the attack. “Such an attack is a violation of the very essence of Indian democracy,” the group tweeted.

The Congress on Monday won 982 of the 2,664 wards in Karnataka’s urban local bodies elections. The Bharatiya Janata Party finished second with victories in 929 wards. The election to 45 seats in three town panchayats in Kodagu district was postponed because of the recent floods.

Around 64% of the registered voters cast their ballots. Apart from the three city corporations, 29 city municipalities, 53 town municipalities and 20 town panchayats went to the polls.