The National Grid Corporation of the Philippines said the power disturbance started at around 3:53 a.m.
“Reports indicate that the Mindanao grid experienced a disturbance at 3:53 a.m. NGCP is still determining the cause and extent of the disturbance,” the NGCP, in a statement, said.
The NGCP said it was working to restore power transmission service to all power customers in Mindanao.
As of 7 a.m. Thursday, power has been restored in Davao City.
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