The woman had gone missing on Tuesday after she went to collect grass from the jungle.
Police suspect that the woman was raped before being murdered yesterday.
In another incident, a Dalit man was shot dead and his son injured by four persons after he refused to sell them liquor in Rehkara in the district.
60-year-old Ramkumar was shot dead last evening, police said, adding a case was registered against four people in this connection.