The Congress leader had obtained the license for his double-barrel gun in 2011 when lived in Tonto, Jhinkpani. He has been arrested for possessing another weapon.
Mahto and his wife Sunita Kumari was earlier arrested in October 2014 on the charges of human trafficking. He has been out on bail since September 2016.
According to reports, a boy named Vivek Srivastava was brutally stabbed by the mob protestors and another one was beaten up in the night around 10 pm when the two boys were passing by on a bike.