SEOUL, July 25 (Xinhua) -- The Democratic People's Republic of Korea (DPRK) fired two unidentified projectiles into the eastern waters early on Thursday, according to South Korea's Joint Chiefs of Staff (JCS).

The projectiles were launched near the DPRK's eastern coastal city of Wonsan at 5:34 a.m. and 5:57 a.m. local time respectively, and flew about 430 km, the JCS said in a statement.

Citing the JCS official, Yonhap news agency reported that the projectiles were believed to be fired from mobile launchers and travel at an altitude of about 50 km.

The military authorities of South Korea and the United States were analyzing what the projectiles were, the JCS said.

The South Korean military maintained a defense posture, closely monitoring relevant situations in preparation for a possible additional launch.

It was the DPRK's first launch of projectiles since the country fired projectiles twice in May. During the latest firing of two projectiles on May 9, those traveled about 420 km and 270 km each.