Stockholm terror attack suspect 'from Uzbekistan' and was 'previously known to security services'
The man in custody suspected of carrying out the Stockholm truck attack has previously figured in intelligence material, Swedish security police said on Saturday.
"The arrested man was not part of any of the security police's ongoing investigations. However, he is a person who has previously figured in our intelligence flow," head of the Sapo security police, Anders Thornberg, told reporters.
National Police chief Dan Eliasson confirmed that the suspect is a 39 year-old from Uzbekistan.
He told a news conference officers also found an object in the lorry which "could be a bomb or an incendiary object", adding that they are still investigating.
The man suspected to have been driving a lorry which mowed down pedestrians in the heart of Stockholm was arrested but has not spoken, police said.
He is being questioned on suspicion of "terrorist crimes through murder" following Friday's rampage in a busy shopping district in the Swedish capital.
The identities of the four people killed in yesterday's terror attack have not yet been confirmed.
10 of the 15 victims injured in the attack are still being treated in hospital, officials said on Saturday, four of whom are in a serious condition.
Two of those four are in intensive care. One child was injured but not seriously, a spokeswoman for Stockholm County Council confirmed.
Following the attack Sweden's prime minister, Stefan Lofven, said "everything indicates that this is a terrorist attack" and later vowed he would not give in to attempts to destroy democracy.
The prime minister said: "If it is a terrorist attack, and regardless of whether it was carried out by an organisation or a lone perpetrator, the aim of terrorism is to undermine democracy, to sow discord between people so that more people will begin to hate and distrust one another.
"But those kinds of acts will never succeed in Sweden. We know that our enemy is this kind of vile murderer - not one another. We will use all of Sweden's strength to track you down.
"Our message will always be clear: you cannot suppress us, you cannot control our lives, you will never win."
Reports suggested a pram was caught in the path of destruction at around 3pm on Friday.
A nationwide manhunt was launched and police arrested the man in the Stockholm area.