Gautam Gorai, Govinda Gorai and Gopal Gorai were arrested after their sister-in-law lodged an FIR yesterday accusing them of raping her.
The 22-year-old pregnant woman, who hails from Purulia district of West Bengal, alleged that all the brothers-in-law had sexually assaulted her, but her husband, eldest among the siblings, did not pay any heed to her complaint.
Police also arrested the woman's husband and her other in-laws this morning for allegedly inflicting mental torture on her by demanding a motorcycle.