Documents found at the Tazreen apparel factory in Bangladesh, where 112 workers died in a fire nearly two weeks ago, indicate that three American garment companies were using the factory during the past year to supply goods to Walmart and its Sam’s Club subsidiary.

The documents — photographed by a Bangladeshi labor organizer after the fire and made available to The New York Times — include an internal production report from mid-September showing that 5 of the factory’s 14 production lines were devoted to making apparel for Walmart.

In a related matter, two officials who attended a meeting held in Bangladesh in 2011 to discuss factory safety in the garment industry said on Wednesday that the Walmart official there played the lead role in blocking an effort to have global retailers pay more for apparel to help Bangladesh factories improve their electrical and fire safety.

Ineke Zeldenrust, international coordinator for the Clean Clothes Campaign, an anti-sweatshop group based in Amsterdam, said Walmart was the company that “most strongly advocated this position.”