The bank's continuing support undermines efforts to keep its cotton out of the global garment supply chain until it ends the use of forced labor, according to a report from Human Rights Watch and the NGO Uzbek-German Forum.
Forced labor remains systematic in Uzbekistan, and research by the organizations has documented the existence of the practice in a World Bank project area, the report said.
For the annual harvest, the government of Uzbekistan forces hundreds of thousands of people, including medical professionals, school teachers and children as young as 10, out into the fields to collect the crop, working long hours, human rights workers say.
In 2015 and 2016, the Bank's investments in the country amounted to more than USD 500 million, according to the groups. And, rather than curtailing support for the Uzbekistan cotton sector, the World Bank has instead increased support and commercial investment, the statement said.
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The World Bank told AFP that it took allegations of forced labor seriously and that monitoring by the International Labor Organization, a UN agency, had been unable to identify incidences of forced and child labor tied to World Bank projects.
Uzbek officials in the United States did not respond to AFP enquiries. But the government has in the past likened the cotton harvests to patriotic national service or claimed that pickers are justly compensated for work performed voluntarily.
The Uzbek government threatens to expel students and fire workers or withhold welfare payments to those who refuse to take part. Human rights workers say independent monitors who examine labor conditions face violence and intimidation.
A World Bank spokesman said the global lender did not condone forced labor in any form.
"We continue to voice our strong concerns on labor issues to the government of Uzbekistan and we have been working with the International Labor Organization to put in place a robust monitoring program," the spokesperson said.
The ILO had identified no child and forced labor concerns in World Bank projects in Uzbekistan.
However, today's report criticized ILO monitoring, saying it involved government or pro-government organizations.