The family members alleged that the girl ended her life as her complaint was not registered, a charge denied by the police, who said that the victim's kin had not given any application to lodge an FIR.
The Congress held protests in all major cities of Gujarat as part of the party's call for 'satyagraha' by its leaders and workers at district headquarters of states across the country.
A security guard informed a police patrolling vehicle which was just 100 meters from the incident spot. The police team rushed the victim to a hospital and later arrested all four culprits.
There is a nationwide outrage over the gang-rape and murder of the 19-year-old Dalit girl who fought grievous injuries for a fortnight before dying on September 29.
On Thursday, Rahul Gandhi, Priyanka Gandhi along with several party leaders were detained by the police and sent back to Delhi, after they tried to reach Hathras to meet the family of the Dalit woman.