In this undated file photo, a citizen walks past the CLP Group's logo in Hong Kong. (PARKER ZHENG / CHINA DAILY)

HONG KONG – The Electrical and Mechanical Services Department urged CLP Power Hong Kong Ltd to immediately launch a comprehensive review of its power supply system after an electricity outage hit Tsing Yi on Sunday, the second within this week.

The EMSD said in a statement that it asked CLP Power to determine the cause of the incident and carry out preventive inspections to ensure that it does not happen again.

According to CLP Power, a fault occurred in the underground cable at On Mei House, Cheung On Estate, affecting 388 customers

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The power outage occurred in Tsing Yi at around 9:38 am. According to CLP Power, a fault occurred in the underground cable at On Mei House, Cheung On Estate, affecting 388 customers before the power supply was fully restored at 11:04 am.

On New Year’s Day, a voltage dip in an electrical substation in Tsing Yi led to reports of people being trapped in lifts and automatic fire alarms sounding in Kwai Tsing, Ma On Shan, and Sha Tin.

“In view of the recent power incidents, the EMSD will step up inspections of the facilities and operations of CLP to monitor their technical and electrical safety performance,” the EMSD statement reads.

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The EMSD added that it will meet with CLP Power on Monday and required it to submit a detailed report on the incident within two weeks.