Singapore temporarily suspended all road and rail construction on Friday to carry out safety checks after a viaduct under construction collapsed, killing a worker from China and injuring 10 of his colleagues.
Preliminary investigations showed corbels - brackets that help support beams - had given way while the construction team was working in the early hours.
"As a precautionary measure, LTA is checking all other work sites," the Land Transport Authority said in a statement.
"Works at all LTA road and rail construction sites will observe a safety timeout this morning."
Three of the injured were also Chinese, one was Indian and six were Bangladeshis.
Engineers responsible for the project had been ordered to carry out a detailed investigation into the design and construction quality, the LTA said.
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