One Briton, one Belgian, two Swedes killed in Stockholm attack, police have said.
An 11-year-old schoolgirl has been confirmed to be amongst the victims, according to local media.
The Briton killed in the attack has been named as Chris Bevington, 41, with his family saying they are devastated by his "untimely and tragic death".
He worked as a director for music streaming service Spotify and was based in Stockholm with his family.
A statement from John Bevington, father of Chris, issued by the Foreign Office said: “We are all devastated by the untimely and tragic death of our talented, compassionate and caring son Chris. A wonderful husband, son, father, brother and close friend to many. The family requests absolute privacy at this incredibly difficult time to mourn his passing in peace.”
Police said that the suspect in custody has expressed "extremist sympathies".
Police added that the man suspected of carrying out the attack, a 39-year-old from Uzbekistan, was an asylum seeker who had his residence application rejected.
British father Chris Bevington was killed in the Stockholm terror attack
On Saturday the child's desperate relatives appealed for help in finding her after she failed to return home from school.
A relative of the girl said: “No one knows anything, she is just missing,” said one of the girl’s relatives.
They added: “She usually always travels at that time, and that is a natural place for her to be. She knows the area well and it is a normal place for her to be on a daily basis.”
The Stockholm Terror attack – in pictures
Fri, April 7, 2017
The vehicle drove into crowds on Drottninggatan (Queen Street) – one of the city's major pedestrian streets, just before 3pm local time, before crashing into Åhlens Mall
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Truck rams into crowds in central Stockholm
Swedish police spokesman Jan Evensson said: "All four deceased are now identified and family to the deceased are notified.
"There are two Swedish citizens among the deceased and there are two foreign citizens among the deceased and the countries' embassies are being contacted as we speak."
Police have also confirmed that a second person has been arrested in connection with the Stockholm terror attack.
Police remain vigilant in Stockholm after the lorry attack in the city centre
Last night 10 people still remained in hospital.
Sweden's royal family joined hundreds of mourners at the site where the beer truck crashed into the crowded shopping street.
Princess Victoria laid roses on the ground yesterday and wiped away a tear.
She said: ”We must show a huge force, we must go against this," she said.
Police spokesman Jonas Hysing said that there was no evidence to suggest any further attacks were likely.
He added that the suspect had been denied permanent residency in Sweden and was wanted for deportation.
Officials confirmed that five other people of interest to the investigation remained in police custody while another 500 have been questioned over events.
Police remove the beer truck used in the attack
A truck drove into pedestrians on the busiest shopping street in Sweden’s capital on Friday before crashing into a department store, killing four people and injuring 15 others.
Witnesses say the terrorists appeared to target children as it zigzagged along the pedestrianised street as they saw buggies “flying through the air”.
Tourist Glen Foran said: “It swerved from side to side. It didn’t look out of control, it was trying to hit people. It hit people, it was terrible. It hit a pram with a kid in it, demolished it.”
Mourners pay their respects to the dead and injured in the Stockholm lorry attack
A Foreign Office spokesman said: “Stockholm police have confirmed that a British man was killed during the attack in Stockholm. We are supporting his family in Sweden and in the UK. Our thoughts are with them and all those affected at this terrible time. We will stand shoulder to shoulder with Sweden as they deal with this tragedy.”
A Downing Street spokesman said Theresa May had called the Swedish Prime Minister Stefan Löfven “to express her condolences and those of the British people for the terrible attack that took place in Stockholm”.
He said: “She was clear that the UK stands firmly by Sweden’s side, and they agreed on the importance of working together to tackle these threats, which we all continue to face,” he said.
Police investigate the scene after the Stockholm lorry attack
Belgium's foreign minister said on Twitter that a Belgian woman is among the four people killed in Stockholm on Friday by a man who rammed a stolen truck into downtown shoppers.
Minister Didier Reyders said: "We have unfortunately have a lost a compatriot in the Stockholm attack."
The Belgian news agency Belga, quoting Reyders, says the woman had been reported missing and was first identified via her identity papers and later by DNA testing.