The incident happened at Ranpal village under the jurisdiction of Panikoili police station on January 25 when 73-year-old Bhagaban Das and his 67-year-old wife Premalata were tied a tree in front of their house and assaulted over a land dispute, the police said.
The accused, all residents of the same village, were arrested yesterday, a police official said.
On Thursday, a quarrel ensued between the old woman and one of the accused over a petty issue.
Later, Panikoili police reached the spot after and rescued the couple, he said.
The old couple alleged that they used to be regularly harassed by the accused persons over a land dispute, he said.
The police arrested the accused persons yesterday on the basis of the complaint lodged by the old couple.