Louisville, Ky. (WDRB) -- A loud "boom" noise that might have startled or awakened residents likely was the result of a Marine Corps Reserve Unit conducting a training exercise on Fort Knox.
A Marine Corps Reserve Unit fired a "mine clearing line charge" between 9:30 and 10 a.m. early Sunday. Spokesman Ryan Brus says it was a munition designed to clear obstacles from a mine field.
A Fort Knox official said the noise likely carried farther because of the low cloud cover.
"Normally that wouldn't have been something residents wouldn't have heard," said Ryan Brus, a Fort Knox spokesman.
Neighbors should not anticipate any other large booms.
The unit had been on the post for days but has since left.
The Marine Corps Unit was a combat engineering brigade, which has elements from West Virginia and Tennessee.
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