A U.S. website claims to have put two and two together and discovered that North Korea's latest nuclear test was planned and funded by Iran. The World Trjbune stated that the nuclear test was, in essence, a test of an Iranian nuclear weapon and involved scientific as well as financial involvement by the Iranian government.
Moreover, the weapon was not a step toward a North Korean or Iranian nuclear weapons capability. It was in fact a demonstration of a common North Korean and Iranian operationally-ready nuclear weapon.
It also seems likely that the nuclear weapon design tested would be the baseline system for both countries. Iran and North Korea claim that the nuclear weapon will target Israel and the US, but who knows. It might fall anywhere. The international community must punish Iran and North Korea for disrupting world peace.