A North Korea Scud-B missile is displayed at the Korea War Memorial Museum on August 26, 2017 in Seoul, South Korea.

The top U.S. and South Korean military officers agreed to make a strong response to North Korea's latest ballistic missile launch on Tuesday, including possible unspecified military measures, South Korea's Yonhap news agency said.

The chairmen of both countries' Joint Chiefs of Staff agreed on a phone call "to take response measures at the earliest possible time that can demonstrate the alliance's strong will including military measures," Yonhap reported, quoting the South Korean military.

The Office of the Joint Chiefs of Staff in Seoul could not be reached immediately for confirmation. A South Korean defense ministry official said there was no immediate plan to change joint military drills being conducted by the South Korean and U.S. militaries.