Denver elementary school locked down over suspicious person on campus

DENVER -- Authorities locked down Denver's Johnson Elementary Monday just before 2 p.m. as police rushed to the scene. 

Denver Public Schools officials said Monday the elementary school locked down for roughly a half hour over a suspicious person on campus. 

Denver Public Schools safety officers and Denver Police officers both responded to the scene. Authorities said police performed a room-by-room search of the campus before reopening the school.. 

It's not known whether or not a person was taken into custody.