Poland’s Internal Security Agency has charged a Chinese manager at tech giant Huawei in Poland and one of its own former officers with espionage against Poland on behalf of China, Polish state television reported on Friday.

Axar.az reports citing Time.

The two men were arrested on Tuesday. Polish security agents also searched the offices of Huawei and Orange, Poland’s leading communications provider, where the Pole had recently worked, seizing documents and electronic data. The homes of both men were also searched, according to TVP, the state broadcaster.

The development comes as a U.S. dispute with China over a ban on Huawei is spilling over to Europe, the company’s biggest foreign market, where some countries are also starting to shun its network systems over data security concerns.

Maciej Wasik, deputy head of Poland’s special service, said that the operation that resulted in the arrest of the two suspects had been underway for a long time and was planned with care.

He said “both carried out espionage activities against Poland.”

Polish state TV, which is close to the government, identified the Chinese man as Weijing W., saying he was a director in Poland at Huawei. Also going by the Polish first name Stanislaw, the Chinese man had previously worked at the Chinese consulate.

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

Huawei issued a statement from its Chinese headquarters that said it was aware of the situation and looking into it.

Geopolitical tensions over Huawei intensified after its chief financial officer, who is the daughter of founder Ren Zhengfei, was arrested Dec. 1 in Canada in connection with U.S. accusations that the company violated restrictions on sales of American technology to Iran.

Huawei has been blocked in the U.S. 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.