The four, Subhash Mehta, Arvind Bhuiyan, Dulal Bhuiyan and Bijan Bhuiyan were arrested after the woman Kalawati Devi filed a FIR naming 12 persons yesterday, the sources said.
The woman was beaten up last Sunday at a meeting called by villagers for allegedly practicing black magic at Piprakala village under Maneka police station.
The villagers also fined the woman Rs 10,000 and forced her husband to sell his land to pay the fine, the police said.