The Electrical & Mechanical Services Department (EMSD) announced that it is investigating a train suspension incident that happened yesterday evening on the MTR Tseung Kwan O Line, which was caused by a failure of the traction power supply system.

At around 5.15pm yesterday, the Government received notification from the MTR Corporation Limited (MTRCL) that services on the Tseung Kwan O Line were disrupted and subsequently suspended.

The Government expressed that it is deeply concerned about the incident. The EMSD has requested the MTRCL to conduct a comprehensive review and submit an investigation report as soon as possible to explain the cause of the incident and propose improvement measures to prevent recurrence of similar incidents.

Upon receiving notification from the MTRCL, the EMSD immediately deployed professional railways and electrical engineers to the site to assess the situation and conduct an investigation.

Preliminary findings indicated that a section of the overhead cable was found faulted in the tunnel of the Tseung Kwan O Line near Quarry Bay Station. The traction power supply system was tripped when the train passed through the section.

The EMSD also found signs of damage to the overhead cable at the scene and initially suspected that the cause of incident was related to the damage of cable components.

In addition to continuing its investigation at the scene concerning the traction power supply system, the department made it clear that it will inspect the train that was involved in the incident at the depot.

The investigation encompasses the consideration of power distribution system, train components, environmental conditions and human factors, etc.