North Korea fires ballistic missiles, US officials say
North Korea has test-fired two ballistic missiles, the latest in a series of rocket launches.
US officials said the medium-range missiles, launched off the east coast, flew about 800km (500 miles) before falling into the water.
Afterwards, the US called for Pyongyang to refrain from raising tensions.
It comes a day after US President Barack Obama imposed new sanctions, following North Korea's "illicit" nuclear test and satellite launch.
His executive order freezes North Korean government property in the United States. It bans US exports to - or investment in - North Korea and also greatly expands powers to blacklist anyone, including non-Americans, dealing with North Korea.
The 6 January nuclear test and 7 February satellite launch were violations of existing UN sanctions, as are ballistic missile tests.