A Bangladeshi victim in the case filed over her rape by four men in the southern Indian city of Bengaluru, has been taken there from Kozhikode city in adjoining Kerala state, police said today.

"Our team traced her and bought her from Kozhikode in Kerala," Deputy Commissioner of Bengauluru Police Dr S D Sharanappa said.

The 22-year-old woman was subjected to medical tests at the Government Bowring and Lady Curzon Hospitals for the assault and rape, police sources said, according to our New Delhi correspondent.

She was trafficked to India by Mohammed Babu, a resident of Dhubri in Assam, about three years ago, they said.

Following a financial dispute, she was assaulted by six people, including a woman, and later four of them raped her and brutalised her about a week ago, the sources said.

While assaulting and brutalising her, one of them recorded the incident, which went viral mainly in Bangladesh, Assam and West Bengal, they said.

Acting on a tip-off from the Bangladesh police, the Bengaluru police went to a house, where illegal Bangladeshi migrants had taken shelter, and arrested them.

On last Friday, two of the accused Hridoy Babu and Rakibul Islam Sagar were injured when they tried to flee. The police shooting took place while the accused were being taken for police verification.

Police sources said there was a wide network of traffickers from Bangladesh in connivance with people from Murshidabad in West Bengal, Hyderabad in Telangana, Dhubri in Assam and people from Karnataka state whose capital city is Bengaluru which is also India's IT hub.

The girls the gang members used to traffic from Bangladesh, Assam and West Bengal were forced into prostitution and were subjected to extreme exploitation, the sources said.

So far, six members have been arrested while investigations are on to trace the others, they said.