North Korea launched another missile Wednesday morning, but it failed within seconds of launch, according to U.S. Pacific Command.
The missile launch comes as the U.S. and South Korea continue their annual military drills. North Korea historically views this as practice for an invasion and tends to respond angrily.
It is not yet clear what kind of missile was launched. The quick failure suggests it may be a new type of missile that has not been tested much.
Also on Wednesday, a U.S. Air Force B-1B bomber and South Korean fighter jets conducted joint training exercises that displayed "strong deterrence against North Korean nuclear and missile threats," South Korea's Defense Ministry said.
American defense officials said Tuesday the U.S. was expecting another North Korean missile launch within the next few days after spotting a missile launcher being moved.
On Saturday, North Korea claimed it tested a "historic" rocket engine days after U.S. Secretary of State Rex Tillerson said "all options" were on the table to deal with North Korean tensions. Dictator Kim Jong-un called the test the "March 18 revolution."
Earlier this month, it fired four missiles. Several landed in the Sea of Japan.
The Associated Press contributed to this report.