CNN Politics:

A Russian military exercise triggered an unusual warning at a critical U.S. military base in Germany, on Saturday, that ballistic missiles had been launched, according to multiple U.S. defense officials.

The warning at Ramstein Air Base resulted in several minutes of uncertainty and alarm until an all-clear was sounded, according to the officials.

The initial assessment is that the missile warning may have been triggered when U.S. intelligence satellites detected a launch. Highly-classified U.S. military satellites that track the infrared trail of ballistic missiles determined that a submerged Russian submarine had test-fired four intercontinental missiles from its underwater location in the Sea of Okhotsk, off eastern Russia, on Saturday.

The alarm was sounded in Germany moments later. A statement by the U.S. military in Europe, on Monday, acknowledged the incident at Ramstein and in the surrounding areas, where personnel received computerized notifications. A missile warning was also sounded on Ramstein via a loudspeaker system…

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