The incident took place at Valthera village two days ago.
Pallaviben Jadav (45), who works at an Anganwadi (government-run nursery school), had been entrusted the task of distributing Aadhaar cards, police said.
Later, Vegad and some 25 others went to the woman's house in the evening and allegedly attacked her, her husband and some other family members with sticks and sharp weapons.
Koth police registered a case under IPC sections related to attempt to murder and dacoity, and also under the SC-ST (Prevention of Atrocities) Act.
The accused belong to the Karadia Rajput community which falls in the OBC category, police said.
"It was also alleged that the accused snatched away Pallaviben's mangalsutra. The accused also allegedly tried to set one of Jadav's relatives on fire," said P D Manvar, Deputy Superintendent of Police, SC/ST Cell, Ahmedabad.
Manvar, who is investigating the case, said three persons were arrested today.
Bharat Vegad, one of the accused named in the FIR, later filed a complaint against Pallaviben and her husband, alleging that it was the couple and their relatives who attacked him and others, the DSP said.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)