Police have ruled out terrorism as the motive behind a shooting that left three dead in Denmark's capital.
A 22-year-old suspect has been arrested after gunfire rang out ahead of a Harry Style's concert in Copenhagen last night.
Three people were killed, including two 17-year-olds from Denmark and a 47-year-old Russian, and four others were critically injured.
A witness filmed the gunman pacing around Field's Mall, where the shooting took place, with a rifle over his shoulder.
Copenhagen police chief Soren Thomassen said there is nothing to suggest the shooting was an act of terrorism.
The police boss confirmed that a boy and a girl, both aged 17 and from Denmark, were killed in the attack, Danish tabloid BT reports.
A 47-year-old man with Russian citizenship also died, Mr Thomassen said.
During a press conference held this morning, police confirmed the shooter was known to Danish mental health services.
Mr Thomassen told the press conference: "Our suspect is also known among psychiatric services, beyond that I do not wish to comment."
The injured include two teenage girls, aged 16 and 19, alongside a 40-year-old woman and a 50-year-old man.
The suspected shooter has been charged with manslaughter.
Harry Styles scrapped his gig which was due to take place near the scene of the shooting.
He said the attack had left him 'heartbroken'.
A statement from Harry Styles concert promoter Live Nation said: "Tonight's concert with Harry Styles has been cancelled by direction of the Danish Police.
"We are all truly devastated by the events of today and our thoughts are with the victims and their families.
"We are looking into future possibilities for the show, and hope to be able to give ticket buyers direct information as soon as possible."
In a tweet, Styles said he was "heartbroken" and "devastated for the victims".
"I'm heartbroken along with the people of Copenhagen," he said. "I adore this city. The people are so warm and full of love.
"I'm devastated for the victims, their families, and everyone hurting.
"I'm sorry we couldn't be together. Please look after each other. H."
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"Denmark was hit by a cruel attack on Sunday night. Several were killed. Even more wounded," Prime Minister Mette Frederiksen said in a statement late on Sunday.
"Innocent families shopping or eating out. Children, adolescents and adults.
"Our beautiful and usually so safe capital was changed in a split second," she said. "I want to encourage the Danes to stand together and support each other in this difficult time."
Police launched a massive search operation throughout the local Zealand region early Sunday evening in search of any accomplices.
However, Mr Thomassen said police now believe the gunman acted alone.
He confirmed the weapons used in the attack were legal, although the suspect did not have a permit for them, BT reports.