International security

North Korea fires ballistic missiles into ocean, South Korea's military says

South Korean and Japanese officials said North Korea fired four banned ballistic missiles on Monday that flew about 620 miles, with three of them landing in Japan’s exclusive economic zone. The firing was an apparent reaction to huge military drills by Washington and Seoul that Pyongyang insists are an invasion rehearsal. 

The U.S., however, only confirmed and tracked one missile, which traveled about 500 miles into the Sea of Japan, CBS News national security correspondent David Martin reports. The U.S. is still investigating reports of three other missiles. It could be that one broke up into parts that looked like three more, Martin adds.

The exact type of missile fired was not immediately clear. But it was not an intercontinental ballistic missile, Martin reports.