On 5 August 1993, a locomotive was conducting maintenance work in Clementi station before the start of service. A 60-cent rubber ring broke, resulting in of oil to be spilt across the track. Ten Jurong East-bounded trains reported braking difficulties when stopping at the station, with the eleventh train activating its emergency brakes, and was stationary for two minutes longer than scheduled at Clementi station. At 07:50, an oncoming train then collided front-to-back into the stationary train, injuring 132 commuters. The oncoming train's automatic protection system, which brakes the train when it gets too close to another train, did not work. A witness in the moving train described the accident as "everyone was pilled on one another. There was screaming and shouting. It was crazy". More than 100 officers from the
Special Operations Command,
Clementi Police Division, and Traffic Police arrived at the site and closed off roads for
Civil Defence officers, who opened jammed train doors. Eight people were escorted to the
National University Hospital,
Singapore General Hospital, or
Alexandra Hospital for head injuries, spinal injuries, and other injuries. The trains were removed from the station during the night, and MRTC engineers ran checks on rail, signalling, and power. ==Investigation==