A TV screen showing a news program reporting about North Korea's missile launch with file footage, is seen at the Seoul Railway Station in Seoul, South Korea, Oct. 4. AP-Yonhap

North Korea fired two short-range ballistic missiles toward the East Sea on Thursday, South Korea's military said, after a U.S. nuclear-powered aircraft carrier was redeployed to the waters the previous day.

The Joint Chiefs of Staff (JCS) said it detected the launches from the Samsok area in Pyongyang between 6:01 a.m. and 6:23 a.m. It did not provide other details.

The launches came just two days after the North's intermediate-range ballistic missile launch over Japan.

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The USS Ronald Reagan returned to waters east of South Korea after it departed last week following an exercise with the South Korean Navy and then trilateral anti-submarine warfare drills involving Japan.

The carrier is expected to engage in another trilateral exercise with Japan in the international waters of the East Sea later in the day. (Yonhap)