The pair are set to remain in custody for at least three months and apparently face up to ten years in prison.
China is highly concerned over the issue, the Ministry of Foreign Affairs' press office said in a faxed response to questions. Chinese authorities then detained two Canadians - a former diplomat and a business consultant - on suspicion of endangering national security.
Last Tuesday (8 January), ABW counterintelligence officers entered the homes of both suspects and secured documents and electronic data at the premises of Huawei Poland, the Office of Electronic Communications and Orange Poland.
Huawei's chief financial officer, Meng Wanzhou, was arrested December 1 in Canada in connection with United States accusations that the company violated restrictions on sales of American technology to Iran.
The two employees arrested include a Chinese national and a Polish national, both of whom worked at Huawei in Poland.
The allegations were that Huawei was using its kit to spy on other governments - claims the firm has strenuously and repeatedly denied.More news: Gonzalo HIGUAIN close to leaving AC Milan and joining Chelsea
USA intelligence agencies allege Huawei Technologies Cos Ltd is linked to China's government and that its equipment could contain "backdoors" for use by government spies.
Reports have shown that the Chinese technology giant circumvented sanctions imposed on Iran and North Korea by providing them with telecommunications equipment that can be used to spy on their populations, otherwise known as "dual use technologies".
The case broke as a number of countries are limiting Huawei's activities in their territory as they fear it would give access to Chinese authorities to critical information and networks.
It's the latest setback for Huawei in Europe, where the company has ambitious plans to roll out next-generation "5G" mobile networks, which it is a leader in developing. Mr. Wang did not immediately respond to a request for comment via the social media site.
Nonetheless, intelligence bods recommended banning the use of the kit, and official blocks are in place for state-funded projects in the US, Australia and New Zealand.
"ABW (Internal Security Agency) officials conducted actions, as a result of which, we handed over belongings of one of our employees", Orange Polska said in a statement. "We have no comment for the time being". The company said it did not know if the investigation was linked to the employee's professional work, and that it would continue to co-operate with the authorities.
Huawei has been blocked in the US since 2012, when a House Intelligence Committee report found it was a security risk and recommended that the government and private companies stop buying its network equipment.