N Korea says 'important announcement' at 0630 GMT: Yonhap

North Korea said it will make an "important announcement" at 0630 GMT today, the South's Yonhap news agency reported, just hours after Pyongyang was suspected to have conducted its sixth nuclear test.
The announcement comes after a 6.3-magnitude explosion was detected near the North's Punggye-ri nuclear test site by US monitors, which Seoul's defence ministry has said was "suspected to be its sixth nuclear test".