A South Korean national was allegedly molested by some locals in a private bus in Kolkata on Monday, the police said.
The Kolkata Police said they have arrested an accused.
A case has been registered at Burrabazar Police Station.
The incident happened when the victim was travelling in a bus with two other South Korean nationals, reports said.
A British tourist suffered serious injuries in her leg when she tried to escape a rape attempt by a hotelier at Agra city in Uttar Pradesh last week.