A high tension cable fault has affected supply of electricity to parts of Xlendi and Munxar, Enemalta said.
It said the fault occurred at 5.30 a.m. and at 7.22 a.m. supply was restored to most of the consumers.
However, one substation in Xlendi could not be reenergised through alternative sources and Enemalta's employees were deployed to locate the fault and initiate repairs which would take about 10 hours to complete.
The corporation apologised for any inconvenience caused.