The four had sold the plot by falsely claiming before the Sub-Register, Berhampur, that the woman member of the gang was the land owner, police said.
The arrested persons were identified as Ram Murthy Pradhan of Goilundi, Naresh Sahu of Nimakhandi, Pratap Chandra Panigrahi of Lanjipalli and Chandraprabha Pati of Lanjipalli, police said.