The incident came to light Wednesday after CCTV footage of the incident was aired on social media sites. Rizwana Begum, the accused, was arrested the same day under IPC section 394 (voluntarily causing hurt while committing robbery), a senior police official said.
In the 2-minute-long video, the woman is seen brutally thrashing the girl who is crying in pain. Begum allegedly snatched away the girl's ear-rings, the official said.
Police recovered them from Begum after she was arrested and further probe is on the case is still on.