Power has been mostly restored to Indonesia’s capital Jakarta, and nearby cities, 12 hours after a huge blackout began on Sunday.
The outage hit tens of millions of people, and Jakarta’s newly-opened metro system was evacuated. Mobile phone networks were also affected.
The failure was caused by technical issues, state power company PLN said.
Nearly 10 million people live in Jakarta, and some 20 million in the surrounding cities.
Outages also hit neighbouring provinces, home to tens of millions more.
The disruption began at midday on Sunday local time (05:00 GMT), and power was slowly being restored nine hours on.