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Moscow has released video of its latest Sarmat intercontinental ballistic missile - dubbed 'Satan' by NATO - being test launched.
The Pentagon said it had detected a "probable" missile launch and that it was in the process of assessing it.
Yemen's Houthi rebels said they fired the missile and that the target was the Saudi capital's King Khaled Airport
Launches conducted for land, sea and submarine-based weapons.
Iran claims to have successfully tested a new, mid-range ballistic missile, but says it is not breaching the 2015 nuclear accord.
South Korea carries out live fire military drills as the UN Security Council meets
Alarms ring out in northern Japan alerting residents that North Korea had fired a ballistic missile over the country's Hokkaido island.
North Korean leader Kim Jong-un has delayed a decision to fire missiles toward the US-held territory of Guam.
Japan has begun moving its defence system to the west of the country after North Korea announced plans to launch ballistic missiles near the US Pacific territory of Guam.