The injured activist, Mallikarjun Bhaikatti, who was attacked by Shiv Sena activists has been admitted to a hospital.
Shiv Sena today sacked the workers who assaulted and blackened the face of a Right to Information activist at Latur in Marathwada region, after he "exposed" an illegal construction case.
Yuva Sena chief Aaditya Thackeray condemned the incident and said the action of the party workers was disgraceful.
The activist Mallikarjun Bhaikatti, through an RTI query, revealed that around 14,000 square feet illegal construction was carried out in a four-storeyed building and boys hostel on the Latur-Nanded road.
The Sena workers had assaulted and smeared ink on Mr Bhaikatti face in presence of around 4,000 students at a Latur college. Local Sena activist Abhay Salunke had said Bhaikatti was a "blackmailer".
The injured activist has been admitted to a hospital.
Mr Bhaikatti on Thursday had addressed a press conference in Latur to "expose" the illegal construction, police said.
Earlier this month, Sena workers had blackened the face of Sudheendra Kulkarni, chairman of the Observer Research Foundation, in a paint attack ahead of the launch of book authored by former Pakistan foreign minister Khurshid Mahmud Kasuri.
The Sena was opposed to a Pakistani politician coming to India and launching a book. Under pressure from the Shiv Sena a concert by Ghulam Ali was also cancelled in the city.
The Sena's actions have been criticised by Chief Minister Devendra Fadnavis who had earlier said that such incidents bring bad name to the state. The Sena responded by saying it was not ink attacks but incidents like the Dadri lynching that brought a bad name.