Bangladesh moved a second group of Rohingya Muslim refugees to a low-lying island in the Bay of Bengal on Tuesday, despite opposition from rights groups worried about the new site's vulnerability to storms.

The United Nations said it has not been involved in the relocation but urged the government to ensure no refugee is forced to move to the Bhasan Char island, which only emerged from the sea 20 years ago.

The Bangladesh navy took the 1,804 Rohingya to the island in five ships, with the refugees sitting on wooden benches on the deck, some clutching ducks, pigeons, and...