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, reports the BBC.

He was detained on Friday evening, after police released a grainy CCTV image of a person of interest, with a second arrest reportedly made later.

Swedish Prime Minister Stefan Lofven has called it a terrorist attack.

More than a dozen people were injured.

The country’s borders have been tightened at the prime minister’s request.

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.

The beer company that owns the vehicle said it was hijacked outside a nearby restaurant, where it was making a delivery.

BDST: 1157 HRS, APR 08, 2017
SR