SSP, J Ravindra Gaur said that all the four arrested today were involved in the gangrape of the woman and they have also confessed to the crime.
The incident took place on August 20 when the victim was returning from the field along with her family, police said, adding, her husband and son were overpowered by the accused who were hiding in the jungle.
The accused had tied the victim's husband and son and then gangraped her, they said.