A US army base has been locked down after an "active shooter" was reportedly seen on site.
Fort Lee, in central Virginia, said all personnel had been ordered to immediately "enact active shooter protocols".
"An active shooter incident has been reported on Fort Lee at CASCOM HQ, Bldg. 5020," a statement on the base's Facebook page said.
"All personnel should enact active shooter protocols immediately. The installation is being locked down until further notice. More info to follow."
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Freezing with some fog patches tonight