SPRINGFIELD, TN (WSMV) - Two inmates being held on federal charges escaped from the Robertson County Detention Facility early Wednesday morning.

The inmates, Joshua Edward Caldwell, 29, and Jessie Louis Lobbins, 26, are considered dangerous and known to be violent. 

They escaped at about 2 a.m., but officials did not notice they were gone until 4 a.m., according to Robertson County Sheriff Bill Holt.

The inmates escaped by gaining access to the roof of the jail and jumping over a razor wire fence. 

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