These cover key areas of protection, education, skills-training, livelihoods and health, which will help support the refugees to lead decent lives on the island and better prepare them for sustainable return to Myanmar in the future, says UNHCR
HRW however said the refugees often likely did not understand that the data being collected, including photographs, fingerprints and biographic data, could be shared with Myanmar.
Bangladesh has shifted 18,000 refugees out of a planned 100,000 to the low-lying silt island of Bhashan Char from squalid, cramped settlements on the mainland where 850,000 of them live.
The fire was the deadliest since more than 740,000 Rohingya fled a military crackdown in Myanmar in 2017 that UN investigators concluded was executed with "genocidal intent".
Including a similar sized group who were moved on Friday, it brings to around 6,700 the number of Rohingya refugees that Bangladesh has moved to the island of Bhasan Char since December.
This time we have received a total 3,242 Rohingya in two days. Everyone is happy with the arrangements here,
More than 700,000 Rohingya packed the camps in Bangladesh in 2017 after a deadly Myanmar military clampdown that the United Nations has said could be genocide.