Chinese telecommunications equipment maker Huawei said on Saturday it had sacked an employee arrested in Poland on spying charges in a case that could intensify Western security concerns about the company.

Poland's internal affairs minister, Joachim Brudzinski, called for the European Union and NATO to work on a joint position over whether to exclude Huawei from their markets following the arrest of the Chinese employee and a former Polish security official on Friday.

Huawei, the world's biggest producer of telecommunications equipment, faces intense scrutiny in the West over its relationship with China's government and U.S.-led allegations that its devices could be used by Beijing for spying.