Photo: A screenshot of onsite video circulating on social media shows a big video panel fell down onto the stage.

The  accident that a video panel fell down and wounded at least two dancers at Mirror concert at the Hong Kong Coliseum in Hung Hom on Thursday evening was caused by a metal suspension cord that snapped, according to an initial investigation, the Secretary for Culture, Sports and Tourism of Hong Kong Special Administrative Region (HKSAR) Kevin Yeung told reporters after visiting the Coliseum on Friday.

Yeung said it was too early to conclude who was responsible for the accident, according to RTHK on Friday. Yeung told the media after the inspection of the Hong Kong Coliseum on Friday that the HKSAR is paying attention to the accident and needs time to conduct a thorough investigation. 

The Chief Executive of HKSAR John Lee expressed sympathy and required comprehensive investigation over the accident that happened during a concert by the popular boy band Mirror held at the Hong Kong Coliseum in Hung Hom on Thursday evening, according to the HKSAR official website on Friday.

Richard Li Tzar-kai, chairman of PCCW, the parent company of concert organizer MakerVille, is highly concerned about the incident and has promised to cover the medical fees of a dancer who was seriously injured, according to RTHK. 

The dancer, "Mo" Lee Kai-yin, had eight hours of surgery on Friday, according to media reports.

The HKSAR has already instructed the concert to be suspended until the structure of the stage is proved to be safe, according to the official information website of HKSAR. The local authorities have required relevant departments to set up a task force to investigate the cause of the accident and to follow up on it.

For a larger stage performance, the person in charge of renting the venue is responsible for the safety of the facilities, and will be responsible for the construction, and hire qualified engineers to certify that the facilities are safe to use, according to Now.com, citing Yeung as saying.

The relevant department will confirm that it obtained documentary approval before allowing the performance to proceed; we will strictly enforce the law and find out who is responsible for the accident, said Yeung.

Yeung pointed out that relevant department officials were aware of some incidents that had occurred earlier at the same concert, including complaints about the position of people on the stage and people falling down, and had proposed some suggestions for improvement to the organizers, the report said.

The related employees had worked the whole night in the Coliseum to investigate the reasons, according to the report.

The onsite video circulating on social media shows that a big video panel fell down onto the stage during the boy band Mirror's concert, hitting at least two dancers. The incident occurred at around 10:35 pm, according to local media reports.

Five people were injured during the accident and three of them were rushed to Queen Elizabeth Hospital, where one was in a serious condition, and the other are in stable condition, RTHK reported on Friday. Some fans at the site said they were shocked, while others said the accident caused psychological trauma, according to the report.

"I am shocked by the incident. I express sympathy to those who were injured and hope that they would recover soon," John Lee said in a statement on Friday. Lee has contacted the relevant departments to comprehensively investigate the incident and review the safety requirements of similar performance activities in order to protect the safety of performers, working staff and members of the public.

MakerVille, the concert organizer said it will cancel the remaining performances and livestreaming and will take thorough investigation over the cause of the accident. 

The organizer Music Nation Group and MakerVille issued a statement to express sympathy to the injured and apologized. The organizer said they will cooperate with the authorities and relevant departments and report to the police if there's any illegal act. 

Hong Kong Theatre Arts Practitioners Union issued a statement on Friday via social media to urge the relevant organizations to bear all responsibilities involved in the incident and ask the local police and relevant departments to conduct an investigation regarding the incident.

Lawmaker Kenneth Fok Kai-kong of the sports, performing arts, culture and publication sector also called for a thorough investigation of the incident.

Since its official opening on April 27, 1983, the Hong Kong Coliseum is one of the most popular multipurpose indoor stadiums for international sports events, entertainment programs, pop concerts and conventions.