Seven Bangladesh navy ships carrying 1,804 Rohingya refugees have arrived at an isolated island where they will be relocated despite concerns among human rights groups about their safety.

They reached Bhashan Char island, 21 miles from the mainland, after a four-hour naval journey from the port city of Chittagong, government official Mohammed Khurshed Alam Khan said.

He said authorities at the island received 433 men, 523 women and 848 children.

Authorities insist all were willing to be relocated and no pressure was placed on them.

Rohingya refugees wait in a naval ship to be transported to an isolated island in the Bay of Bengal, in Chittagong, Bangladesh
Rohingya refugees wait on a naval ship to be transported to an isolated island in the Bay of Bengal (Mahmud Hossain Opu/AP)

But several human rights and activist groups say some were forced to go.

It was the second group of Rohingya refugees transferred from crowded, squalid camps in Cox’s Bazar district to the island.

Authorities sent a first group of 1,642 on December 4 despite calls for a halt by human rights groups.

Rear admiral Md Mozammel Haque, commander of the local navy, said the number of refugees willing to join the second phase of relocation “exceeded their expectations”.

He said the authorities were initially expecting to relocate around 1,200 refugees, but 1,804 chose to go.

The island surfaced only 20 years ago and was not previously inhabited.

Rohingya refugees wait in a naval ship to be transported to an isolated island in the Bay of Bengal, in Chittagong, Bangladesh
Authorities said no pressure was placed on the refugees to relocate (Mahmud Hossain Opu/AP)

It was regularly submerged by monsoon rains but now has flood protection embankments, houses, hospitals and mosques built at a cost of more than 112 million dollars (£83 million) by the Bangladesh navy.

The island’s facilities are designed to accommodate 100,000 people, just a fraction of the million Rohingya Muslims who fled waves of violent persecution in their native Myanmar and are currently living in the camps in Cox’s Bazar.

International aid agencies and the United Nations have opposed the relocation since it was first proposed in 2015, expressing fear that a big storm could wash over the island and endanger thousands of lives.

The UN also voiced concern that refugees be allowed to make a “free and informed decision” about whether to relocate.

Rohingya refugees board a naval ship to be transported to an isolated island in the Bay of Bengal, in Chittagong, Bangladesh
Human rights groups have criticised the move (Mahmud Hossain Opu/AP)

Amnesty International and Human Rights Watch have urged the government to cancel the plan.

An influential cabinet minister and general secretary of the governing party, Obaidul Quader, said that the Rohingya are being moved to the island because their repatriation to Myanmar has been delayed.

He said refugees who were earlier taken to Bhashan Char have expressed satisfaction.

About 700,000 Rohingya Muslims fled from Buddhist-majority Myanmar to Bangladesh after August 2017, when Myanmar’s military began a harsh crackdown on the minority group following an attack by insurgents.

Rohingya refugees wait in a naval ship to be transported to an isolated island in the Bay of Bengal in Chittagong, Bangladesh
The Rohingya are not recognised as citizens in Myanmar (Mahmud Hossain Opu/AP)

Security forces have been accused of mass rapes, killings and burning thousands of homes.

Bangladesh has attempted to start sending refugees back to Myanmar under a bilateral agreement, but no-one was willing to go.

The Rohingya are not recognised as citizens in Myanmar, rendering them stateless, and face other state-sanctioned discrimination.