Rakhmat Akilov, 39, was arrested by Swedish police in the wake of the fatal attack that included one Brit killed.
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.
Ihrman and police spokesman Lars Bystrom said only one person had been arrested in the case.
He is suspected of driving a stolen beer truck down a busy pedestrian street mowing down shoppers before smashing into the facade of the Ahlens department store.
The man suspected of hijacking a truck and using it to commit Friday's attack in Sweden, killing 4, had been denied residency in that country, officials said Sunday.
Mr Evenssen said police were holding five more people in connection with the deadly attack, after raids over the weekend, and that they had conducted about 500 interviews as part of the inquiry. "On the contrary, the suspicions have strengthened", national police chief Dan Eliasson said on Saturday.
"I am urging the public to be vigilant and keep updating the police", Lofven said. And though it's unclear whether the suspect was a Swedish citizen or how long he'd been in the country, the attack had some city residents re-evaluating the country's stance on immigration.
He said police found a suspect device in the cab of the truck.
He was known to have expressed sympathy for groups including so-called Islamic State, but had been seen only as a "marginal character", police said. A memorial service was also planned for the victims of the attack in Sergelstorg, the central square next to Drottninggatan, at 2 pm (1200 GMT).
"Today, all of Sweden is in mourning, but we're going to get through this together", he told reporters after laying a bouquet outside the Ahlens department store.
It was the second terror attack in Stockholm.
The man arrested remains officers' prime suspect for the attack, which saw a hijacked lorry plough into the front of a shop in the pedestrian thoroughfare of Drottninggatan.
Of the injured, 10 remained in hospital, two of them in intensive care.
Thousands of people were to gather in central Stockholm Sunday for a "Lovefest" vigil against terrorism.