DHAKA: Scores of Bangladeshi garment factories were shut on Thursday as protesting workers demanded higher wages, prompting owners to consider withholding pay from those on strike.

The unrest, which began in October, threatens to disrupt an industry that earns around US$38 billion annually, accounting for four-fifths of the country's export earnings and employing more than four million workers.

The Bangladesh Garment Manufacturers and Exporters Association (BGMEA) has called for calm as wage negotiations continue.

The South Asian nation of 170 million people is the world's second-biggest garment exporter behind China, supplying major international fashion brands.