Swedish authorities have arrested a senior diplomat suspected of espionage. The Swedish Security Service (Säpo) confirmed the arrest, saying the diplomat is believed to have passed sensitive information to a foreign power over an extended period.

The arrest, which took place earlier this week, comes amid growing concerns in Sweden over foreign intelligence activities targeting the country's political and security institutions. Säpo stated that the investigation is ongoing and that the diplomat, whose identity has not been officially disclosed, is being held in custody as prosecutors prepare charges.

In an unusual development, the investigation is also examining possible links between the diplomat's arrest and the sudden resignation of Sweden's National Security Adviser last week. The adviser, Henrik Landerholm, stepped down citing "personal reasons," but the timing has raised questions inside Sweden's political and security circles.