The state police on Sunday arrested seven people linked to the incident after a video of the assault went viral.
The sisters, thought to be 19 or 20 years old, were seen being slapped, kicked, and beaten up with sticks and slippers by relatives on 22 June in a village in Dhar district. According to police, the women's family members were angry with them for talking to the sons of their maternal uncle on the phone.
"On 25 June, we came across a video in which two women were seen being beaten up. While verifying the clip, we came to know that their family members were involved in this," said police officer Vijay Vaskale.
While the sisters cried for help, several onlookers continued to watch the crime and record videos instead of helping them. The women were later taken to the local police station and a case was filed based on their complaint.
WARNING! The following video is disturbing and may offend sensibilities
Similarly, another tribal woman from Madhya Pradesh was tied to a tree and beaten up with sticks for leaving her husband.