Three Dua Lipa fans were injured at her show in Toronto on Wednesday night after fireworks that were apparently snuck into the venue were set off during the concert.

Videos shared on social media capture the moment that the fireworks started in the floor section of the Scotiabank Arena. Police told CityNews that three people suffered minor injuries and were seen by the medics working at the concert but did not require further medical assistance.

Fans interviewed by the Toronto outlet say the crowd frantically dispersed after hearing the initial fireworks go off, which left some concertgoers with small burn marks on their legs and shoes. Online, fans are reporting that concert security at the entrance of the arena was not diligent enough while checking bags upon entry — with some saying their bags were not checked at all.

Although she didn’t directly address the incident while on stage, videos show Dua with a slightly confused expression on her face as the commotion started. The fireworks were set off while the pop singer was ending her performance on the opposite side of the arena.

Dua uploaded a statement to her Instagram stories on Thursday evening affirming that she and her team were “just as shocked and confused by the events as you all are.” She concluded: “Bringing this show to life for my fans has been such an amazing experience, and I’m so deeply sorry for anyone who was scared, felt unsafe or whose enjoyment of the show was affected in any way.”

The singer also confirmed that police — who are working alongside Scotiabank Arena security — are currently investigating who was responsible for smuggling the fireworks inside the concert. Anyone with additional information is being asked to contact the Toronto police.