The Malaysian government has yet to respond to a letter from a team of United Nations experts with queries on alleged abuses of Bangladeshi workers in the country.

The queries were raised by Tomoya Obokata, a UN special rapporteur on contemporary forms of slavery, including its causes and consequences, Robert McCorquodale (chair-rapporteur), Gehad Madi (special rapporteur on the human rights of migrants), and Siobhán Mullally (special rapporteur on trafficking in persons, especially women and children).

The official communication, recorded in the UN’s Office of the High Commissioner for Human Rights database, was...