Three people were injured after unauthorized fireworks were set off inside Scotiabank Arena during a Dua Lipa concert Wednesday night. Toronto police said they are investigating the incident.

The concert was underway at the packed arena when an audience member threw a firework. Videos shared on social media showed the moment the fireworks started in the floor section of the arena.

Medics arrived at the scene to treat the three people who suffered minor injuries, police told CityNews. Fans at the scene told the local media outlet that the crowd frantically dispersed after hearing the initial fireworks go off. Some concertgoers had small burn marks on their legs and shoes.

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The concert was part of the Levitating singer’s Future Nostalgia tour happening throughout North America, Europe and Oceania.

“…Out of the blue these fireworks came out of nowhere, and at first everyone was surprised and was not really understanding that,” one concergoer, identified as Carla Baptista, told CP24 on Thursday.

“We thought it was part of the concert but suddenly it went in all directions and then we saw some people in the ground level running and trying to protect themselves,” she added.

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Police said that they are working with security at the arena and viewing surveillance video. No suspect has been named or taken into custody so far.

If a suspect is arrested, they could face charges of mischief and endanger life, police said.

Maple Leaf Sports & Entertainment, owner of the arena, said in a statement that the fireworks were “unauthorized and illegal.”

“As one of the premier venues in North America, creating a safe and secure venue for every attendee at Scotiabank Arena is MLSE’s top priority and we immediately began working in cooperation with Toronto Police Services to fully investigate this reckless and dangerous act,” the company said in a statement to CP24.