A construction crane at the National Art Gallery construction site on Coleman Street toppled over on Thursday morning around 9am.

The main contractor for the project is Takenaka-Singapore Piling Joint Venture and the developer of the project is the National Heritage Board. The Gallery in a statement on Thursday said that supervisors at the site observed that the crane started to dip and immediately closed off Coleman Street.

When the crane's jib snapped and landed on the road, no workers or vehicles were affected, it added. There was also no damage to the former Supreme Court and City Hall buildings where the construction works were being carried out.

The one-way road at the junction of St Andrew's Road and Coleman Street was also closed temporarily. The Singapore Civil Defence Force confirmed that there were no reported injuries and the Gallery added that investigations are on-going to determine the cause of the incident.