Story highlights NEW: US flies B-1 bombers over South Korea

US flies B-1 bombers over South Korea Warhead struck within 23 feet of target point, says North Korea

(CNN) North Korea claims it fired a new type of ballistic missile Monday, demonstrating its ability to carry out a highly accurate strike.

Experts, however, have expressed skepticism, noting there is no way to independently verify the test results.

The warhead atop the test missile fell just 23 feet (seven meters) from its target point, according to a statement from Pyongyang's state-run Korean Central News Agency.

The KCNA report did not give a distance the missile covered, but Japanese and South Korean monitors said it flew 248 miles (400 kilometers) over the Sea of Japan/East Sea from a launch point on Wonsan, on North Korea's east coast.

KCNA said Monday's test proved its ability to launch and guide a warhead equipped "with control wings." Such a warhead, also known as a "maneuverable re-entry vehicle," enables it to make corrections in midflight for greater accuracy.

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