SEOUL — North Korea said it test-fired two types of submarine-launched strategic cruise missiles on Wednesday, according to state media reports Thursday, the latest in a series of weapons demonstrations by the nuclear-armed state. The Korean Central News Agency (KCNA) said the missiles were launched into the East Sea, also known as the Sea of Japan, and that the test had "no adverse impact on the security of neighboring countries," according to reports carried by Channel NewsAsia and NDTV.