(CNN) - The world’s largest bike manufacturer, Giant, is warning U.S. customers of shipment delays.

Thursday’s announcement comes a day after Customs and Border Protection officials blocked company imports from Taiwan factories.

The agency cited what it said was evidence of forced labor and abusive working conditions at the facilities. It also accused Giant of debt bondage and other indicators of worker abuse.

Giant said it will file a petition to revoke the order.

The company also said it is “firmly committed to upholding human rights and labor protections.’

Giant operates manufacturing facilities in Taiwan, China, Vietnam, the Netherlands and Hungary. But the company said that only shipments made in Taiwan would be affected.

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