France joins UK, US against North Korea nuclear test
France has added its voice to those slamming claims by North Korea that it successfully tested its first hydrogen bomb.
North Korea says the move is a historic event.
The United Kingdom and United States have also condemned the development.
State media made the announcement following reports of an earthquake near a known nuclear testing ground.
Journalist Don Kirk has told Sky News it's a significant development.
"Going back to 2006, this test along with three previous nuclear tests is a very ominous sign," he said.
He added that these tests probably represent an escalation of their nuclear capabilities.
Meanwhile, some experts are sceptical. They believe the detected seismic activity suggested a smaller device.
(File photo: Getty Images)