LOS ANGELES (Reuters) - A U.S. Air Force base near Tucson, Arizona was locked down for about an hour on Monday following unconfirmed reports of "gunshot sounds" heard there, a base spokeswoman said.
No further details of the incident at Davis-Monthan Air Force Base were immediately available, according to a spokeswoman for the base.
The base announced the lockdown on social media shortly before 10 a.m. (1700 GMT), saying that there were "unconfirmed reports of gunshot sounds."
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An all clear was declared about an hour later and the base said personnel there were "free to resume all normal operations."
(Reporting by Dan Whitcomb; Editing by Chizu Nomiyama and Andrew Hay)