Twenty-three dancers who took part in Thursday's MIRROR concert have issued a joint statement, calling on people not to blame any of the performers for the accident that left one of their colleagues seriously injured.

In a post on social media on Sunday, the dancers said they would not comment or give interviews while an investigation continues.

They also clarified that none of them had made anonymous comments online, and that they had no intention of launching crowd-funding for their colleague, Lee Kai-yin, who was seriously injured when a giant video screen crashed down on his head at the Hong Kong Coliseum.

They said the dancers and members of MIRROR were devoted in giving their best and were now getting through the tough times together.

"Please don't blame any of the performers," they said.

Lee remains in intensive care and his condition is critical, but his vital signs are said to be stable.

RTHK understands that his parents received a briefing from the doctors treating him at Queen Elizabeth hospital. They arrived in Hong Kong from Toronto on Sunday morning.

The government is to hold the first meeting on Monday of a joint task force set up to investigate the MIRROR concert tragedy. Its focus, among a number of things, will be to determine if negligence was involved.

The legislator who represents the performing arts sector, Kenneth Fok, said he hoped the government could conclude its investigation into the incident at the Hong Kong Coliseum more quickly, after officials said the work could take up to eight weeks.

He refused to comment on what should or shouldn't be allowed in a concert, after Culture Secretary Kevin Yeung said events would be allowed go ahead at government-owned venues, such as the Coliseum, if the set design was relatively static.

Fok said he hadn't heard of any upcoming concerts being cancelled, and that he and other members of the industry would meet with the government to reflect their views.

The West Kowloon regional crime unit has taken over the police investigation of the incident.

The contractor responsible for stage works at the MIRROR concert, Engineering Impact, earlier released a statement, saying many parties were involved in the production, from brainstorming and design to installations and operations.

It said the company was cooperating with authorities as well as the organisers to find out what went wrong and would not comment on the incident for now to avoid speculation and misunderstanding.