A thorough analysis will determine the type of device used as well as its blast radius.
According to U.S. intelligence official there is no reason to doubt that North Korea had tested an advanced nuclear device.
“We have nothing to cause us to doubt that this was a test of an advanced nuclear device,” said an U.S. official on the condition of anonymity.
China-backed North Korea claimed that it has tested an advanced hydrogen bomb which could be placed on a long-range missile on Sunday.
As per the source, it will take the U.S. administration some time to complete a thorough analysis of the size of the blast as well as the type of device the rogue state detonated on Sunday.