Retail giant Wal-Mart Stores is remaining silent on a class action launched against it in the US by victims of the Rana Plaza building collapse in Bangladesh.

The suit in the US District Court for the District of Columbia targets retailers Wal-Mart, JC Penney and The Children’s Place, as well as the government of Bangladesh.

Plaintiffs include Abdur Rahaman, partner of Sharifa Belgum, a 30-year-old mother-of-four killed in the disaster, and Mahamudul Hasan Hridoy, one of the 2,515 people injured in the collapse two years ago.

They claim that the Bangladeshi government failed to properly inspect the building, failed to ensure compliance with local construction standards, and failed to ensure worker safety.

The suit also alleges the retailers failed to implement standards and oversight mechanisms designed to ensure the health and safety of workers making clothing for their stores.

"Since this relates to pending litigation, we are not going to discuss the details," a Wal-Mart spokesperson told just-style, adding that the company was a founding member of the Alliance for Bangladesh Worker Safety, which aimed to improve factory conditions in Bangladesh.

"Over the past year, the Alliance provided fire safety training to more than 1m factory employees and management, piloted a worker helpline, and provided compensation for approximately 1,000 displaced workers," the spokesperson added.

JC Penney and The Children's Place, meanwhile, have not yet responded to requests for comment.

In a separate lawsuit, a Toronto law firm is reportedly seeking $2bn in damages from Loblaw and its Joe Fresh clothing line, also related to the 2013 Bangladesh garment factory collapse that killed more than 1,100 workers.

The claim was filed in Ontario Superior Court by plaintiff law firm Rochon Genova, according to the Financial Post.