SEOUL, South Korea -- South Korea's Yonhap news agency said Monday that North Korea had fired a missile and several other short-range projectiles into the waters off its east coast.
The reported launches Monday came three days after South Korea said the North fired a medium-range missile into the sea for the first time since early 2014.
Yonhap, citing an unidentified government source, said the South Korean military was trying to find what types of a missile and projectiles were fired.
South Korea's Defense Ministry said it was trying to confirm details.
The launches came as North Korea has condemned ongoing annual South Korean-U.S. military drills that it sees as an invasion rehearsal, and days after the imposition of a fresh round of sanctions punishing Pyongyang for its nuclear and rocket tests.
In recent weeks, North Korea threatened pre-emptive nuclear strikes against Washington and Seoul and test-fired short-range missiles and artillery into the sea in response to tough U.N. sanctions imposed over its nuclear test and rocket launch.
The North says it needs nuclear weapons to cope with what it calls U.S. military threats.