Poland has arrested a Chinese employee of Huawei and a Polish national involved in cyberbusiness on allegations of spying, Polish media reported on Friday, deepening the controversy over Western criticism of the Chinese telecoms equipment maker.

U.S. intelligence agencies allege Huawei Technologies Co. is linked to China's government and that its equipment could contain "backdoors" for use by government spies.

No evidence has been produced publicly and the firm has repeatedly denied the claims. But the criticism has led several Western countries and companies to look into whether they should allow Huawei's equipment to be used in their telecoms networks, straining relations with Beijing.