A mass shooting was reported in Copenhagen, Denmark on Sunday. The incident took place at a shopping mall, which is close to the venue where singer Harry Styles was going to perform.  Several people were killed in the incident, the Danish police confirmed.

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The Danish Police are investigating the incident and have advised people inside the mall to stay inside and await assistance. Others have been asked to stay away. The 22-year-old suspect in connection to the situation has been taken into custody. That person’s identity is yet to be confirmed.

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Several persons were killed in a shooting incident at a Copenhagen shopping mall on Sunday, according to Danish police. They claimed to have arrested a 22-year-old Danish male and that they could not rule out an “act of terrorism.”

“There are several injured, and what we also know now is that there are several dead,” Chief Police Inspector Soren Thomassen told reporters, adding that police had launched a major search effort in the Zealand region.  

Copenhagen Mayor Sophie H. Andersen tweeted: “Terrible reports of shooting in Fields. We do not yet know for sure how many were injured or dead, but it is very serious.”

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Images from the scene showed people running out of the mall, and Denmark’s TV2 broadcaster posted a photo of a man being put on a stretcher. Witnesses said people were crying and hid in shops.

Laurits Hermansen told Danish broadcaster DR that he was in a clothing store at the shopping center with his family when he heard “three-four bangs. Really loud bangs. It sounded like the shots were being fired just next to the store.”

A huge presence of heavily-armed police officers was on hand, with several fire department vehicles also parked outside the mall.

The shopping center is on the outskirts of Copenhagen just across from a subway line that connects the city center with the international airport. A major highway also runs adjacent to Fields, which opened in 2004.

On Snapchat, Harry Styles wrote “My team and I pray for everyone involved in the Copenhagen shopping mall shooting. I am shocked. Love H.” His show, which was scheduled to begin at 8 pm local time, was officially cancelled by the direction of local authorities, although a previous report by the PA agency stated that the concert was to go ahead as scheduled.  

Shortly after the shooting, the royal palace said a reception with Crown Prince Frederik connected to the Tour de France cycling race had been canceled. The first three stages of the race were held in Denmark this year, the palace said in a statement. The reception was due to be held on the royal yacht that is moored in Soenderborg, the town where the third stage ended.