Police have described the suspect as an Islamic State group sympathiser who had gone underground in Sweden after his residency permit application was rejected previous year.
THE Stockholm truck attack suspect from Uzbekistan was a rejected asylum-seeker who eluded authorities' attempts to deport him by giving police a wrong address, Swedish police said yesterday while announcing the arrest of a second suspect.
"The Migration Agency rejected it in June 2016 and also decided that he was to be expelled", he added. "In February 2017, the case was handed over to the police to carry out the order, since the person had gone underground".
The man accused of driving the truck down the busy thoroughfare and into a major department store was arrested shortly after the attack.
"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", he said.
Two men had been arrested earlier on suspicion of involvement in the attack.
Ten of the injured people remained in hospital, with two of them in intensive care, the authorities said.
He had been seen only as a "marginal character", National Police Commissioner Dan Eliasson said.
Police had said on Saturday they were increasingly sure the 39-year-old was the driver of the lorry. The suspects in all the attacks are thought to have been motivated by the views of Islamic State militants.
Initially, he said, he did not know what had happened, but as he made his way to his wife's office, he saw people lying motionless and police officers with body armor rushing to the site.
Police said they had now identified three of the four dead, one of whom was a Belgian citizen, according to a tweet from Belgium's foreign minister. "That is what we're going to build on", she said, praising a city "characterised by openness and tolerance". There has been as yet no claim of responsibility for the Stockholm assault.
On April 7th, at 14:53 in Sweden, an attack at the city centre of Stockholm sent hundreds of people running in fear.
On Sunday, several thousand people gathered at Stockholm's Sergel Square to remember the victims.