The Polish counterintelligence service confirmed on Friday that a Chinese citizen suspected of espionage was arrested. The Polish media have identified the suspect as Huawei's sales director in the country.
Huawei is a Chinese telecommunications company that is viewed by US government officials as a national security risk. Other countries also have concerns: they have been prevented from supplying next-generation 5G equipment to Australia and New Zealand.
The company has attracted even greater control after the arrest of its chief financial officer last month in Canada  Stanislaw Zaryn, spokesperson for Polish counterintelligence, said in a statement to the official news agency of the country that the Chinese citizen, identified as Weijing W., had been arrested along with a Polish citizen.
The houses of suspects were searched on Tuesday, the statement reads. A court ordered the couple to be held for three months, and are sentenced to 1
Both pleaded not guilty, according to the Polish TV-broadcast broadcaster TVP.
Zaryn did not respond to CNN comment requests.
The Chinese company in a statement that is "aware of the situation and we are examining it. "
"Huawei complies with all applicable laws and regulations in the countries in which it operates and we ask each employee to comply with the laws and regulations in the countries in which they are based," he added.
The CFO Meng Wanzhou, daughter of the founder of Huawei, he was arrested in Canada in December. She was released on bail, but faces a lengthy legal battle over extradition to the United States.
The US government claims that Meng helped the company avoid sanctions against Iran. Huawei has repeatedly claimed to be unaware of any wrongdoing by Meng.
The arrest has fueled tensions between the United States and China, which are trying to negotiate the end of their fierce trade war.
It has already fueled a nationalist reaction against American products by some Chinese companies. If Huawei's executive is extradited to the United States, experts warn that US companies in China could suffer reprisals.
Steven Jiang contributed to the report.