SINGAPORE, July 30 -- Minister for Sustainability and the Environment Grace Fu has apologised for the sinkhole that formed on Tanjong Katong Road South, calling it a "serious incident" that "should not have happened."

"On behalf of the Ministry of Sustainability and the Environment and PUB, I would like to extend my sincere apology to the injured driver for the injury suffered as well as for going through a harrowing experience," she told reporters at the site on Monday evening, as reported by The Straits Times.

The sinkhole, which opened up near a PUB sewer-laying construction site on July 26, swallowed a car and injured its driver, who was later hospitalised with muscular pain.

Fu said she understood the driver was still recovering i...