Police in Sweden have arrested two men after a lorry crashed into a Stockholm department store on Friday, killing at least four people. 
The first man to be arrested is being held on suspicion of committing a terrorist crime by murder. He was detained on Friday evening, after police released a grainy CCTV image of a person of interest. 
Police shared the image of the man, dressed in a hooded jacket. They confirmed a man resembling him was arrested in Marsta, 40km (25 miles) north of Stockholm. 
"We have investigated several people this evening, who we found interesting in one way or another, and recently we arrested someone we are very interested in," said police investigator Jan Evensson, referring to the Marsta arrest. 
He is being held on suspicion of committing a terrorist crime, the state prosecutor's office said, and is in prolonged detention, according to a police website. 
The second man, detained in the Hjulsta in the north-west of Stockholm, had links to the man arrested in Marsta, local media reported citing police sources.
The lorry crashed into the front of Ahlens department store in the middle of the afternoon on Drottninggatan (Queen Street), one of the city's major pedestrian thoroughfares. At least four people were killed, and more than a dozen people were injured. Eight adults and a child remain in hospital. 
Swedish Prime Minister Stefan Lofven has called it a terrorist attack. 
Central Stockholm was in lockdown after the incident, and the country's borders have been tightened at the prime minister's request.

Source: QNA