Hong Kong’s education authorities have demanded a written report from a secondary school after a video went viral that apparently shows its principal swearing at security guards during a school trip to Singapore.

The Education Bureau expressed its concerns over the case on Sunday, saying it had approached San Wui Commercial Society Secondary School in Tuen Mun and its sponsoring body and would remain in close contact to provide advice.

“The bureau has demanded that the school seriously follow up on the issue and submit a detailed written account. The school has activated its crisis management team to investigate the matter thoroughly,” a spokeswoman said.

“If a teacher were found to have breached the professional conduct, the bureau would review the teacher’s registration and take appropriate action based on the nature and severity of the incident.”

The footage posted on social media shows a man arguing with two security guards from the doorway of a coach over what appeared to be parking.

It was reported that the man is Lee Cheuk-hing, the school’s principal.