The victim used to order food from a restaurant the four men worked at. Police said a total of six men were following three women that day.
Bengaluru police have arrested four men and are looking for two more for the assault on a woman early on New Year's day.
The assault -- by two men on a scooter -- was caught on CCTV camera.
WION's correspondent in Bengaluru, Nischita Virrendra, said police identified the four men arrested as Chinnu, Raja, Leo, and Aiyappa.
The six men, she added, had been following three women that night.
One of the attacks was caught on camera; it is however still unclear if the other two women were also attacked that day.
She added that the police said the attackers had been stalking their victim for a week, who used to order food from a restaurant the four men worked at.