The Save Lakshadweep Forum alleged that there were ulterior motives behind ousting the non-islanders and it was an attempt to isolate the people of the archipelago.
Thousands of migrant workers gathered at Anand Vihar ISBT in New Delhi to catch a bus home, hours after Chief Minister Arvind Kejriwal announced a week-long lockdown.
The woman who was raped is also a migrant worker. She was called to Ansari's home on the pretext of preparing biryani.
The victim was West Bengal native Sankar, 40, who lived at a rented accommodation in Chungam. Sankar was riding pillion on the two-wheeler.
The incident took place in the wee hours of Monday.
Murshid Hassan, Yakoob Bishwas and Morshraf Hussien, all three residents of Ernakulam, were among the nine people arrested by the NIA on Saturday.
The culprits sexually assaulted the girl at her house while her family was out.
The deceased were identified as Kanayi Vishwakarma, 21; Arvind Kumar, 23; and Hariyom Kunal, 29. They were natives of P S Pandu in the Palamu district in Jharkhand.
Underlining that migrant workers were always in Centre's thoughts during the lockdown, the prime minister said it is an endeavour of his government that workers get jobs near their home and help in the development of villages.
Of the total, a maximum of 32 trains will depart from Kerala while the destinations of most trains will be West Bengal (23).