Four North Indians were allegedly assaulted by about a dozen people after Holi celebrations in a north- west suburb, police said on Sunday.
However, it was not immediately known if activists from the Raj Thackeray-led Maharashtra Navnirman Sena (MNS), which had run an anti-north Indian campaign last month, were behind the attack which occurred in suburban Santacruz's Juhu Koliwada area last night, they said.
"According to the complainant, a group of around 8-10 people asked the victims as to where they hail from and started hitting them with bamboo sticks and fists when told that they were from Bihar," said a senior officer from the Santacruz police station.
A case of rioting has been registered in connection with the incident, he said, adding a passer-by was also injured in the incident.
The complainant in the case works as a driver and all the victims stay in the same locality, he said adding no arrests or detentions have been made in this connection.