N Korea requests aid as it admits 'several hundred' train blast deaths

SECRETIVE North Korea finally admitted last night that several hundred people were killed and thousands injured when trains carrying explosives and blew up in a station.

The Stalinist state the world's most closed society opened its borders to international aid but still kept the disaster a secret from its citizens.

"We need the help of the international community, emergency relief," said Pak Gil, North Korea's ambassador to the UN.