SHENZHEN - Two people have been confirmed dead and three others seriously injured following an equipment collapse at a railway construction site in southern China's city of Shenzhen, local authorities said Friday.

The accident occurred at around 9:30 am Thursday at a construction site for the Guangzhou-Shenzhen-Hong Kong Express Rail Link in Huanggang Park, Futian district, when a reinforcing mattress collapsed and killed two operators at the scene, said a spokesman with Shenzhen's metro office.

The injured persons were hospitalized, and the cause of the accident is under investigation.