The US ambassador to Germany has warned the country that his government would be less willing to share intelligence with German security agencies if the country uses products by Chinese tech giant Huawei or other Chinese companies to set up its 5G mobile networks.

The US has been leading an international campaign to get its allies to boycott Huawei, as it fears that the firm’s telecommunications products may provide the Chinese government with access to the data and systems of foreign governments. Huawei has denied the allegations and recently filed a lawsuit against the US government over the ban.

Read more: US ‘warns Germany a Huawei deal could hurt intelligence sharing’