David Benham, a spokesman with U.S. Pacific Command in Hawaii, said the missile - identified as a KN-15 medium-range ballistic missile - was launched from a land-based facility near Sinpo.
This latest launch comes just ahead of US President Donald Trump receiving his Chinese counterpart Xi Jinping in Florida for a meeting which will have North Korea as one of the main topics.
Two weeks ago, the South Korean and USA militaries said they had detected a failed North Korean ballistic missile launch.
The constant testing has deepened concern especially in nearby Japan and neighboring South Korea - and also in Washington over fears that Pyongyang could soon develop a nuclear-armed missile capable of reaching the US mainland.
Trump has said China must do more to pressure North Korea to halt its nuclear program.
North Korean leader Kim Jong Un looks down on parade participants at the Kim Il Sung Square on Tuesday, May 10, 2016, in Pyongyang, North Korea.
Tillerson said that the USA would not rule out any option in response to provocations by North Korea.
The KN-15 is believed to be an upgraded version of the submarine-launched "Pukguksong" launched last summer. But unlike the KN-15, which uses solid fuel, the missile fired Wednesday used liquid fuel and was sacked from a fixed location, rather than a mobile launcher, the official said. China will likely continue with its current policy of economically and militarily supporting the North Korean regime while, at the same time, ostensibly supporting sanctions against that regime for its nuclear weapons program. "What I am concerned about most nights is North Korea". Along with its rapidly advancing nuclear and long-range missile capabilities, it has its artillery and short-range missiles trained on Seoul, the capital of US ally South Korea and a city of more than 10 million people.
California couple among Hawaii rat lungworm disease victims
He still has shoulder pain, tremors and difficulty with fine motor skills. "Don't ever say to me that labour is hard". According to Janice Okubo, a spokeswoman for the state Department of Health, the last case had taken place in 2010.
"It's a message to both of them, and the message is that 'look, we're gonna do what we're gonna do, '" said Michael Madden, an expert on North Korea's leadership.
It flew a distance of around 60 kilometers (37 miles) and flew as high as 189 kilometers (117 miles), South Korean officials said.
A senior U.S. White House official said Trump wanted to work with China and described the discussions over North Korea as a test for the U.S.
North Korea's state media has also said the world will soon witness what it calls "eventful successes" the country achieves in the space development.
In February the North simultaneously fired four ballistic missiles off its east coast, three of which fell provocatively close to Japan, in what it said was a drill for an attack on USA bases in the neighbouring Asian country.
South Korea now has several Hyunmoo-type missiles in its arsenal, including the Hyunmoo-2A, the Hyunmoo-2B and the Hyunmoo-3, which have ranges of 300, 500 and one-thousand kilometers. "In particular, most submarine-launched ballistic missiles use solid fuel". China fears a North Korean regime collapse would lead to a refugee crisis and may bring the USA military presence closer to its borders.
Yonhap News reports that Hayden also quoted former Director of National Intelligence James Clapper's assessment that Pyongyang would be "crazy" to halt its nuclear program after the effort already devoted to it, and China regards North Korea as a "bad toothache" it can generally ignore.