An 18-year-old man has been detained in Stockholm on suspicion of planning a terrorist attack.

Arrested by the national task force at Kungsträdgården, he faces charges including preparation for terrorist crimes and attempted murder.

Authorities link him to violent Islamist extremism and believe he joined a terrorist group last summer.

A psychological evaluation has been ordered as part of the investigation.

In a related development, another individual was arrested in Malmö on Thursday.

This arrest is connected to the 18-year-old's case, according to Säpo, Sweden's security service.

Both arrests are part of an ongoing investigation, with no immediate threat to the public, officials confirm.