One person was killed on Friday when a strong natural disaster struck Indonesia's island of Java, said the US Geological Survey. There have been unconfirmed reports of more casualties.
There was no immediate indication of a tsunami, but authorities said they had issued a warning following the tremor, which struck a coastal region some 300 kilometres from the capital late yesterday.
An quake with a magnitude of 6.5 struck off the coast of Java in Indonesia, the United States Geological Survey (USGS) said on Friday, but there were no reports of casualties.
A man assesses damage to his Java home as the 6.5 magnitude quake.
Buildings had collapsed and were damaged in several cities and towns of central and western Java, Mr Nugroho said.
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People living in some flats in Jakarta ran into panic or were asked to evacuate when the quake also shook the capital.
Nugroho said strong tremors had been felt for about 20 seconds in Jakarta and in cities and villages in western and central Java.
The quake struck at 11.47pm (12.47am HKT) only about 350 kilometres southeast of Jakarta.
Nobody has reported feeling the quake, according to Paul Caruso, a geophysicist with the USGS National natural disaster Information Center in Golden, Colorado.
Indonesia is located on the "Pacific Ring of Fire" and has frequent earthquakes and volcanic eruptions.