A White House internal review of strategy on North Korea features the possibility of both military force as well as regime change in order to thwart Pyongyang's nuclear-weapons threat, the Wall Street Journal reported on Thursday citing sources familiar with the process.

The strategy review, reported to have begun a fortnight ago, combined with U.S. President Donald Trump's January vow to prevent North Korea from ever testing intercontinental ballistic missiles. The report – which could not be verified by CNBC - hints at a possible shift in U.S. foreign policy which could potentially rattle allies of both nations.