BBC: The 7.1-magnitude earthquake struck near Kumamoto, Japan at 15:25 GMT on Friday, a day after a tremor that killed nine people.
There are fears that a number of people may be trapped in collapsed buildings after the new earthquake, in the Kyushu region of south-western Japan, says the BBC’s Rupert Wingfield-Hayes in Tokyo.
It is difficult to tell which of the buildings were damaged in which earthquake, our correspondent says, adding that a wider area has been hit.