K-pop group NewJeans has lost a legal battle to leave its record label Ador.

A South Korean court on Tuesday ruled that the act's contract with the label, which runs until 2029, remains valid.

The group's five members - Hanni, Hyein, Haerin, Danielle and Minji - announced last year that they were unilaterally leaving the agency, citing mistreatment and manipulation.

The group has said it will appeal the ruling, according to local media reports.

The case had stunned the Korean entertainment industry.