Japan issues rare mega-quake warning after country rocked by huge 7.6 magnitude tremor
The warning marks the first time the alert has been issued since it was introduced
World News
'Good Samaritan' in critical condition after being stabbed by illegal migrant on US train
The stabbing happened on the same train line as the blood-curdling killing of a Ukrainian refugee earlier this year
Tsunami warning issued after major 7.6 magnitude earthquake strikes off Japanese coast
Shaking could be felt as far away as Tokyo
