A lorry has smashed into a store in central Stockholm, killing at least four people.
At least a dozen people were also injured in the incident on Drottninggatan (Queen Street), one of the city’s major pedestrian streets, on Friday afternoon.
Swedish Prime Minister Stefan Lofven said everything pointed to an act of terrorism.
Police said they were still hunting for the driver.
A different person was arrested earlier, after police released a grainy image of a man caught on CCTV.
The held man is deemed to be a person of interest in the case.