North Korea has fired a submarine-based ballistic missile, drawing condemnation from the US.
The KN-11 missile was launched off the coast of Sinpo and flew about 500km (300 miles) before falling into the Sea of Japan, a US official said.
South Korea’s Yonhap news agency said the missile had fallen inside Japan’s Air Defence Identification Zone.
North Korea, believed to be developing nuclear weapons, is banned by the UN from any use of ballistic missiles.
The reported test follows an attempted launch last month that South Korea said failed in its initial flight stage.