It marks the fourth known rocket test by Pyongyang this month . The rockets have an estimated range of 60 km , official says . South Korea and North Korea criticize the tests as provocations . The United States has said such tests are appropriate responses to U.S.-South North Korean military drills .
The rockets have an estimated range of 60 km , official says . South Korea and North Korea criticize the tests as provocations . The United States has said such tests are appropriate responses to U.S.-South North Korean military drills .