The MTR Corporation will inspect platform screen doors at all stations along the Tseung Kwan O Line after a fire at the North Point station disrupted services yesterday.
The station was closed for about three hours and 300 commuters were evacuated after a passenger reported smoke on the station's Platform 3, which serves Po Lam and LOHAS Park, at about 10.20am.
MTR staff informed the Fire Services Department when a smoke detector sounded an alarm in the control room.
"When firemen arrived in the No3 platform, the supporting structure on top of a screen door was emitting white smoke and there was a small fire," a department spokesman said.
Eight fire engines and one ambulance were sent to the station with almost 50 firemen and paramedics. Carbon-dioxide extinguishers quickly doused the flames.
Services on the Tseung Kwan O line were suspended between North Point, the line's Hong Kong Island terminus, and Tiu Keng Leng.
Services from Tiu Keng Leng to Po Lam ran at five-minute intervals and trains on the branch line between Tiu Keng Leng and LOHAS Park at 10-minute intervals.
Services on the Island Line were maintained but trains did not stop at North Point.
All services were back to normal by about 1.20pm but without the screen doors at North Point.
When services resumed, some passengers at North Point were surprised to find the platform screen doors switched off.
"That's dangerous. They shouldn't have resumed services if the screen doors could not be closed," commuter Tsang Kwong-ling, 70, said.
MTR's head of operations, Francis Li Shing-kee said: "From preliminary investigations, it is believed that faulty insulation in the supporting frame for one set of platform screen doors caused the smoke when the doors were operated," Li said.
He said the MTR would carry out an inspection of North Point station's screen doors that would take one to two weeks.
All screen doors on the Tseung Kwan O Line would also be checked, he said.