The Huawei logo displayed at the main office of Chinese tech giant Huawei in Warsaw, Poland, on Friday, Jan. 11, 2019. Poland's Internal Security Agency has charged a Chinese manager at Huawei in Poland and one of its own former officers with espionage against Poland on behalf of China. (AP Photo/Czarek Sokolowski)

The Huawei logo displayed at the main office of Chinese tech giant Huawei in Warsaw, Poland, on Friday, Jan. 11, 2019. Poland's Internal Security Agency has charged a Chinese manager at Huawei in Poland and one of its own former officers with espionage against Poland on behalf of China. (AP Photo/Czarek Sokolowski)

WARSAW, Poland (AP) — Poland has arrested a director at the Chinese tech giant Huawei and one of its own former cybersecurity experts and charged them with spying for China, authorities said Friday.

The development comes as the U.S. is exerting pressure on its allies not to use Huawei, the world’s biggest maker of telecommunications network equipment, over data security concerns.

The two men — one a Chinese citizen who was a former envoy in Poland before moving over to a senior position at Huawei and the other a Pole who held several top government cybersecurity positions — were arrested Tuesday, according to Poland’s Internal Security Agency.

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Polish security agents searched the Warsaw offices of Huawei and Orange, Poland’s leading communications provider, where the former Polish security expert recently worked, seizing documents and electronic data. The homes of both men, also in Warsaw, were also searched, according to agency spokesman Stanislaw Zaryn.

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. The arrest is a fresh sign that a U.S. dispute with China over its ban on the company is spilling over to Europe, Huawei’s biggest foreign market.

Some European governments and telecom companies are following the U.S. lead in questioning whether using Huawei for vital infrastructure for mobile networks could leave them exposed to snooping by the Chinese government.

Maciej Wasik, deputy head of Poland’s Special Services agency, said the operation that resulted in the arrests of the two suspects had been underway for a long time. He said “both carried out espionage activities against Poland.”

Zaryn told The Associated Press that prosecutors have charged the two men with espionage, but agents are continuing to collect evidence and interview witnesses. Further indictments are expected, he said.

He said no further details would be released about the case because it is classified and the investigation is ongoing.

Polish state television TVP reported that the men have proclaimed their innocence, but Zaryn said he could not confirm that. If convicted, they could face up to 10 years in prison each.

TVP identified the arrested Chinese man as Weijing W., saying he was a director in Poland at Huawei. It said he also went by the Polish first name of Stanislaw and had previously worked at the Chinese consulate in Gdansk.

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A LinkedIn profile for a man named Stanislaw Wang appears to match details of the man described by Polish television.

Wang’s resume said he worked at China’s General Consulate in Gdansk from 2006-2011 and at Huawei Enterprise Poland since 2011, where he was first director of public affairs and since 2017 the “sales director of public sector.” The resume said he received a bachelor’s degree in 2004 from the Beijing University of Foreign Studies.

State TV identified the Polish man as Piotr D., and said he was a high-ranking employee at the Internal Security Agency, where he served as deputy director in the department of information security, until 2011.

The Polish state news agency, PAP, said the man had also held top cybersecurity positions at the Interior Ministry and the Office of Electronic Communications, a regulatory body that oversees cyber and other telecommunications issues.

It said, while at the Internal Security Agency, he was involved in building a mobile communications system for top Polish officials, and he was fired in 2011 amid a major corruption scandal.

Geopolitical tensions over Huawei have intensified since Canada arrested a top executive last month at the request of U.S. authorities. The company has been blocked in the U.S. since 2012 over fears that its equipment is a security risk, and last year Australia, New Zealand and Japan instituted their own bans against using Huawei.

U.S. officials have reportedly fanned out across Europe recently to make their case with governments and Huawei suppliers for blocking the company.

The company and analysts have long maintained that it has never been found guilty of a cybersecurity breach but the latest accusation, if confirmed, will deal a blow to that defense.

“One thing is clear: this is another nail in the coffin of Huawei’s European ambitions,” said Thorsten Benner, director of the Global Public Policy Institute, a think tank.

The arrest might not have a big impact on broader trade tensions between China and the U.S., but it shows that “there will always be competition and acrimony related to Chinese tech companies,” Benner said.

Huawei, which also makes smartphones and other consumer devices, issued a statement from its Chinese headquarters saying it was aware of the situation in Poland and was looking into it.

“We have no comment for the time being. 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,” the statement said.

Poland is Huawei’s headquarters for Central and Eastern Europe and the Nordic region.

An official at the Chinese Embassy in Warsaw said China attaches “great importance to the detention” of the Chinese citizen in Poland and that Chinese envoys had met with Polish Foreign Ministry officials to urge them to arrange a consular visit “as soon as possible.”

The Chinese Foreign Ministry said late Friday it is “closely following the detention of Huawei employee Wang Weijing” and has asked Poland to “handle the case lawfully, fairly, properly and to effectively guarantee the legitimate rights of the person, his safety and his humanitarian treatment,” according to state broadcaster CCTV.

Orange Poland told the AP on Friday it was cooperating with Polish security services in the case and had “handed over belongings of one of our employees” in Tuesday’s search of its offices. Orange told the AP it did not know if the suspicions against its employee were related to his work at Orange or elsewhere.

Huawei’s chief financial officer, Meng Wanzhou, was arrested Dec. 1 in Canada in connection with U.S. accusations that the company violated restrictions on sales of American technology to Iran.

The United States wants Meng extradited to face charges that she misled banks about the company’s business dealings in Iran. She is out on bail in Canada awaiting extradition proceedings.

On Dec. 10, China detained former Canadian diplomat Michael Kovrig and Canadian entrepreneur Michael Spavor on vague national security allegations in apparent retaliation for Meng’s arrest.

China’s ambassador to Canada accused the country this week of “white supremacy” in calling for the release of the two Canadians, while describing the detentions as an “act of self-defense.”

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Chan reported from London. Associated Press writers Joe McDonald and Christopher Bodeen in Beijing contributed to this report.