North Korea could have an operational intermediate-range ballistic missile by next year, an analysis by the influential 38 North website said Monday.

Such a weapon could threaten military installations on Guam and the U.S. nuclear bombers that play a key role in deterrence on the Korean Peninsula.

The report by the North Korea-monitoring website comes after an apparent failed test of a Musudan missile Saturday. U.S. officials said it exploded shortly after launch.