Monday evening's incident at Orchard MRT station that injured four people was caused by an escalator they were on suddenly halting, sending them falling.

A spokesman for the Land Transport Authority (LTA) said that it "takes the issue seriously and will be investigating the cause of the incident". The escalator in question is located in the MRT station underpass, near to Tangs department store. It will remain closed while the LTA investigates the matter.

Two girls aged 13 and 11 suffered lacerations and abrasions on their legs, and were taken by Singapore Civil Defence Force (SCDF) paramedics to KK Women's and Children's Hospital. One woman in her 60s suffered back pain from the incident, while another in her 40s had lacerations on both legs and on her right eye brow. Both were taken to Tan Tock Seng Hospital. The incident happened at about 7.30pm.