STOCKHOLM, April 7 (Xinhua) -- Swedish Security Service SAPO has identified the truck attack in Stockholm Friday afternoon as a terrorist attack.
In the latest press conference, SAPO said it handled the case as a terrorist crime.
"Our main objective is to ensure that there won't be more attacks," said Johan Olsson, chief operating officer of the Security Service.
Swedish Television reported that border controls would be introduced this evening. It is unclear how long they would be in force.
But SAPO said earlier it would not raise the threat level in wake of the suspected terror attack, Swedish Television reported Friday.
"It is continuously reviewed. For a long time it has been on a three on a five-point scale, and the threat level remains at a third. Within the level of fit that an attack may be happening," SVT quoted SAPO press secretary Karl Melin as saying.
"We regard this as a special case and we are working closely with the police to act quickly. It's about the intelligence to find out who or what is behind," said Melin.
Death toll of Stockholm attack rises to four, after one victim died in hospital. Swedish Television quoted hospital sources at Karolinska Institutet as saying that the number of injured from the attack had risen to 15.
