WhatsApp faces an antitrust investigation in the European Union, where regulators said Thursday that they're looking into the messaging service's AI policy.

The European Union has launched an antitrust investigation into WhatsApp's artificial intelligence policy.

Investigators have taken another suspect into custody in a probe targeting so-called “sovereign” citizens, people who reject the government's authority. The 61-year-old man, arrested Tuesday in Kampen, is suspected of being part of a group plotting terrorist offenses or taking part in such crimes. The police confiscated digital devices from a home in Kampen, which are currently under further investigation.