Updated

The Latest on Stockholm truck attack (all times local):

9:25 a.m.

Swedish police say they have arrested a man who is "likely" the driver of a truck which plowed into a group of pedestrians and store, killing four people.

Police spokesman Lars Bystrom told The Associated Press on Saturday: "Yes, it is correct, it is likely him." Bystrom declined to comment on Swedish media reports that the arrested person was a 39-year-old man from Uzbekistan.

Fifteen people were treated in hospitals for injuries they suffered in the attack.

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9:00 a.m.

A Swedish prosecutor says a person has been formally identified as a suspect "of terrorist offenses by murder" by driving a hijacked truck into a crowd of pedestrians, killing four people and wounding 15 others.

The prosecutor, Hans Ihrman, said Saturday that the unidentified suspect should face a pre-trial custody hearing before midday Tuesday or be released.

Ihrman and police spokesman Lars Bystrom said only one person had been arrested in the case.