Dozens of staff at the Singapore office of TikTok’s parent company, ByteDance, have been hospitalised in an apparent food poisoning outbreak.

Health and food safety officials in the city state are investigating the incident, which left 60 people with symptoms of gastroenteritis on Tuesday. Fifty seven of them were treated in hospital.

ByteDance has also said it is looking into what caused its employees to fall ill.

The BBC understands that no food is prepared or cooked at the ByteDance offices and that it uses third party caterers to supply food.

Seventeen ambulances were sent to the building in Singapore’s business district to treat those who had fallen ill, according to local media reports.

“We take the health and safety of our employees very seriously and have taken immediate steps to support all affected employees, including working with emergency services to provide care,” a ByteDance spokesperson told the BBC.

“We are investigating the matter and are working with the relevant authorities on this.”