Canada’s corporate watchdog has launched a probe into the clothing company Guess over possible ties to Uyghur forced labour in China.

Sheri Meyerhoffer, the Canadian Ombudsperson for Responsible Enterprise (CORE), says the company hasn’t done enough to prove that it has no supply relationships with Chinese companies that source materials from factories which employ people being forced to work.

Guess is disputing this claim, stating that Meyerhoffer lacks any credible evidence and maintaining that the three Chinese companies she names aren’t part of its supplier list.

Meyerhoffer says the garment giant has also argued she doesn’t have jurisdiction to investigate the matter, as the Canadian subsidiary isn’t involved in the work that occurs abroad.

Earlier this year, the watchdog had launched similar probes into the Canadian branches of firms such as Nike, , Walmart, Levi Strauss and Hugo Boss.

China has strenuously pushed back on claims that forced labour is occurring, saying they aren’t grounded in evidence and they are motivated to smear Beijing.