Swedish fashion retailer Hennes & Mauritz (H&M) said it was collaborating with trade unions, government as well as the U.N. to improve Labour conditions after a study found violations in garment factories in India.

The study by the Asia Floor Wage Alliance (AFWA) found workers stitching clothes for H&M in factories in Delhi faced problems such as low wages, fixed-term contracts, forced overtime and loss of job if pregnant.

The AFWA, a coalition of trade unions and labour rights groups, accused the Western high street retailer of failing on its commitments to clean up its supply chain.

An official from H&M said that the fashion firm has been working actively to improve the lives of textile workers for many years.

“The issues addressed in the report are industry wide problems. They are often difficult to address as an individual company and we firmly believe that collaboration is key.”

H&M has partnered with the International Labour Organization, the Swedish International Development Cooperation Agency as well as global and local trade unions to seek out solutions.

The fashion industry has come under increasing pressure to improve factory conditions and workers’ rights, particularly after the collapse of the Rana Plaza complex in Bangladesh three years ago, where 1,136 garment workers were killed.