Poland's Counterespionage Defense confirmed on Friday that a spy-suspected Chinese citizen was arrested. The Polish state media identified the suspect as sales manager of Huawei in the country.
China's embassy in Poland called him Weijing Wang.
Huawei is a Chinese telecommunications company classified as a national security risk by US government officials. There are also concerns in other countries: it has been prevented from delivering next-generation 5G equipment to Australia and New Zealand.
The company was further investigated in Canada following the arrest of its chief financial officer last month in Canada.
Stanislaw Zaryn, spokesman for the Polish Counter-Intelligence Team, said in a statement to the country's official press agency that the Chinese citizen identified as Weijing W. had been arrested along with a Polish citizen.
The homes of the suspects were searched on Tuesday said the statement. A court ordered that the couple be held for three months, and sentenced to imprisonment for up to ten years.
Both have not declared themselves guilty, according to the Polish radio station TVP. Zaryn did not respond to CNN's request for comment.
The Chinese company said in a statement that it "is aware of the situation and we'll check it. "
"Huawei complies with all applicable laws and regulations in the countries where it operates and we require every employee to comply with laws and regulations in the countries in which they are located," she added.
A spokesman for the Chinese Embassy in Poland said the country was "very concerned about this incident". Poland was asked to arrange a consular visit "as soon as possible" and to "protect the rights and interests, safety and humanitarian treatment of the data subject", added the spokesman.
CFO Meng Wanzhou, the daughter of Huawei's founder, was arrested in Canada in December. She was released on bail, but is in protracted litigation over extradition to the United States.
The US government claims Meng helped the company impose sanctions on Iran. Huawei has repeatedly stated that there is no known misconduct of Meng.
The arrest has sparked tensions between the United States and China, who have tried to negotiate an end to their bloody trade war.
It has already fueled the nationalist backlash of some Chinese companies against American products. When the Huawei executives are extradited to the United States, experts in the US warn that US companies may be retaliated.
Steven Jiang and Yong Xiong contributed to the coverage.