Chinese factories that supply Apple Inc. and Nike Inc. and make other products sold in the U.S. are shunning workers from Xinjiang, as Western countries increase scrutiny of forced labor from the remote northwestern region where Beijing has been accused of committing genocide against local ethnic minorities.

Lens Technology Co. Ltd, a Chinese maker of smartphone touch screens and supplier to Apple and other companies, phased out Uyghur factory workers transferred from Xinjiang through a state-backed labor program last year, according to former staff and shop owners near one of its factories. The company has also ceased hiring Uyghur workers, according to current staff.

Chinese mask producer Hubei Haixin Protective Products Group Co. Ltd., whose personal protective equipment is sold on U.S. e-commerce sites, no longer employs laborers from Xinjiang, said a company employee who didn’t identify herself before hanging up. The company decided not to renew the contracts of its Xinjiang laborers last September after reports last year alleging the use of forced labor drew negative attention, the employee said.