GUANGZHOU: Two managers of a construction group have been detained for "attempting to cover up" a railway tunnel collapse that left five people dead and one missing in Yun'an county of Yunfu, Guangdong province, on Saturday.

Feng Liangmao and Li Gang, the chief managers of the No 8 section project of the China Railway Tunnel Group were detained on Sunday for submitting a false report 23 hours after the accident occurred, a press release from the Yun'an county government said.

The accident, which left four other workers injured, occurred on Saturday morning, when dozens of laborers were toiling to build the Baiyun tunnel on the Guangzhou-Nanning high-speed railway line in Qiling village.