Swedish police have arrested a second person over a truck attack which killed four people and injured 15 others in Stockholm earlier this month.
Police spokesman Simon Bynlert said the male suspect was arrested yesterday, but gave no more details.
Rakhmat Akilov, a 39-year-old Uzbek man, has pleaded guilty to a terrorist crime after ramming the truck into a crowd outside a main pedestrian shopping street on April 7 during a busy afternoon.
Police have not disclosed a motive for the attack and no extremist group has claimed responsibility.
Akilov was known to have been sympathetic to extremist organisations, but police said that there was nothing to indicate he might plan an attack.
His Swedish residency application was rejected last year.