North Korea fired at least three short-range ballistic missiles into the sea off its east coast on Monday morning, the launches coinciding with the arrival in Seoul of Antony Blinken, the US secretary of state, for a meeting of senior government officials from 30 nations.

Iran PressAsia: The first launch was detected at 7:44 am local time and the missiles were tracked for a distance of around 185 miles before coming down in the Sea of Japan.

Military officials in South Korea said the weapons appeared to have trajectories consistent with KN-24 solid-fuel ballistic missiles, which have a range of up to 250 miles and can carry a warhead of 1,100lbs.

Tensions on the Korean Peninsula have increased in recent months with North Korea testing its weapons and the US, South Korea and Japan strengthening their combined military exercises in response.

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