China’s Huawei has filed a lawsuit against Sweden in the International Court of Arbitration after the Swedish Post and Telecommunications Authority (PTS) denied the company access to developing 5G network infrastructure in the country, Swedish media reported on Saturday.

In October 2020, Sweden banned the use of telecommunications equipment from Chinese companies Huawei and ZTE in 5G networks before holding the first spectrum auction for the 5G mobile communication standard. In response, Huawei threatened to sue Sweden over the matter, according to public broadcaster SVT Nyheter.

Stockholm justified the ban citing national security interests.

The lawsuit was registered with the International Center for Settlement of Investment Disputes on January 21. The amount of the claim is 5.2 billion Swedish crowns ($560 million), but according to the broadcaster, the figure could reach 30 billion crowns.