EPA Swedish police took down the suspect who used a 30-tonne truck to mow down pedestrians

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It comes after two two suspects were arrested following yesterday’s massacre. The first of the suspects is a 39-year-old man from Uzbekistan who was arrested and is being held on suspicion of “terrorist crimes through murder.” Police said that the man arrested yesterday in relation to the attack in the centre of Stockholm is also suspected of being the driver of the truck. Lars Bystrom, a police spokesman said: “The person in question has been arrested as the culprit...in this case the driver.” “Then, there can be other people who are associated with him, but we do not know that at the current time.”

A second man was thought to have been detained in Hjuslsta, a northern Stockholm suburb on Friday at 11pm - but police have not confirmed it. Pictures show the second man, who looked younger, being handcuffed and taken away in a police car. Video footage has emerged showing one man (thought to be the first suspect) wrestled to the ground on a busy street by three police officers. Shocked pedestrians stood and watched as the officers handcuffed him and led him away.

EPA This is the truck that mowed down pedestrians in a busy shopping street in Stockholm

The deadly attack unfolded in Drottninggatan (Queen Street) when a suspect used a 30-tonne hijacked beer truck to plough through a crowded shopping street at 3pm on Friday. He crashed into a department store in the centre of the city leaving four people dead and at least 15 people injured. Local authorities in the capital said early Saturday that six of the injured had been able to leave hospital while eight adults and one child remained hospitalised. Eyewitnesses said that a child in a pram was among the casualties flung through the air after it was caught in the path of destruction.

EPA A bunch of yellow roses were left at the scene of the attack with the message 'Je Suis Stockholm'

Following the attack, police circulated a picture of a man on an escalator wearing a green jacket, grey hoodie and holding a blue phone in connection with the investigation into the attack. Police said that the suspect ran into a subway after the attack and was dripping with blood from an injury. The suspect appeared confused about where to run and then headed towards the train. He was arrested after acting strangely in a shop in Marsta, a suburb of Stockholm. Bomb disposal experts reportedly found a homemade bomb packed into a suitcase inside the hijacked beer truck. The discovery of the bomb bears the hallmark of a terrorist attack, but it is not known why the IED failed to detonate.

Handout This is the suspect who was wanted in connection with the Stockholm terror attack

Authorities later towed the truck away from the scene where the driver had mowed down innocent people. The Aftonbladet newspaper reported that the truck had been hijacked from Swedish beer maker Spendrups earlier on Friday. Witnesses described the moment the lorry smashed through stone lion bollards into the pedestrianised area, leaving a trail of blood and debris. Sources said that the first suspect, a dad, was well known in his community and locals described being "shocked" that he had been arrested in connection with the attack. But the suspect’s Facebook page appeared to show that he ‘liked’ videos of Islamic State and an image of carnage in the aftermath of the Boston Marathon bombing.

EPA People flee from the scene of the terror attack in Stockholm

His attack stunned eyewitnesses who recalled the horror that they'd seen. Harrowing images of the aftermath showed bodies strewn over the road and covered by blankets and blood smeared on the roads. Jan Granroth told Aftonbladet that "we stood inside a shoe store and heard something ... and then people started to scream". He said: "I looked out of the store and saw a big truck."

AFP Prime Minister Stefan Lofven sent a defiant message to the terrorists following the attack

Another witness quoted by the paper said: "When I came out, I saw a lorry standing there with smoke coming from it and there were loads of bits of cars and broken flower pots along the street." Mikael Anttila, a 49-year-old portfolio manager at bank SEB, told the Press Association he saw several hundred people gathered on the street close to the shop before they all started running "suddenly ... like ants". "Then a lot of police started coming. Heavy weapons, civilian police, etc," he said. Annevi Peterson described people lying dead and injured in the street, with blood everywhere. "I heard the noise, I heard the screams, I saw the people," she told BBC News. "There was, just outside the store, there was a dead dog, the owner screaming, there was a lady lying with a severed foot.

AFP As evening fell on Friday, the Swedish prime minister laid a bouquet of red roses near the scene

"There was blood everywhere, there were bodies on the ground everywhere. "There was a sense of panic, people standing by their loved ones, but also people running away." In the aftermath of the devastation, Prime Minister Stefan Lofven sent a defiant message to the terrorists: “Our message will always be clear: you will not defeat us, you will not govern our lives, you will never, ever win.” Mr Lofven has branded the attack “terrorism” as police said security at Swedish borders had been heightened.

EPA A woman weeps for the people caught up in the terror attack in Stockholm

As evening fell on Friday, the Swedish prime minister laid a bouquet of red roses near the site of the attack, lighting a candle. Meanwhile, condemnation poured in as news of the attack broke, including statements from German chancellor Angela Merkel and Foreign Secretary Boris Johnson, who said he was "deeply concerned". EU Commission president Jean-Claude Juncker said: "An attack on any of our member states is an attack on us all." Theresa May called her Swedish counterpart on Saturday to express her solidarity over the “horrible attack.” Sadiq Khan, the Mayor of London said that the Capital stands “united with Sweden.” He said: “Sweden has seen a despicable act of terrorism aimed at harming innocent people and attacking our shared values of democracy, freedom, justice and tolerance.”