The two men were arrested on Tuesday. The man, who went by the Polish first name Stanislaw, also worked at the Chinese consulate in the past.
The other detained person is a former high-ranking official at Poland's internal security agency who worked at mobile phone operator Orange Polska SA, the broadcaster said.
"The Chinese individual is a businessman working for an important telecommunications firm", Maciej Wasik, deputy head of Poland's special services, said.
And in December, Huawei's CFO was arrested by Canadian police, amid allegations she broke sanctions on selling equipment to Iran - something the firm again denied.
The Chinese national was a sales director, though the Polish national's role is unclear. If convicted, the pair could face up to 10 years imprisonment.
The U.S. criticism has led to a number of Western countries and companies to review whether they should allow Huawei's equipment to be used in their telecoms networks.
"We have no comment for the time being". Poland's TVPInfo broke the news earlier today (via Bloomberg, The Wall Street Journal) amid increasing tensions between the US and China. "Huawei complies with all applicable laws and regulations in the countries where it operates, and we require every employee to abide by the laws and regulations in the countries where they are based", it added.
A federal court has ruled the men can be held for three months as the case is investigated further.
The U.S. also pressured European countries to cut ties with the Chinese telecom company amid links to the Chinese government and data security concerns.
A Huawei representative said the company was looking into the matter.
Some European governments and telecom companies are following the US lead in questioning whether using Huawei for vital infrastructure for mobile networks could leave them exposed to snooping by the Chinese government.