A video has surfaced online from within a prison in Alabama showing at least 30 inmates doing the Mannequin Challenge.
The clip, posted to Facebook by an unknown user on November 13, was taken in an Alabama Department of Corrections dormitory and has been viewed more than 200,000 times.
It shows the prisoners fighting, reading and working out, while a group of them can be seen together in a prayer circle.
The original Facebook post read: "Free us… prison reform… free my family!"
It also included the hashtags #ALLlivesMATTER, #GodLovesAll, and #ChaingangChallange.
AL.com report that authorities don't know who filmed the footage and in which prison the 53-second clip was filmed in.
A spokesman for the Alabama Department of Corrections, Bob Horton, said they are investigating it, adding that Alabama's prisons have confiscated more than 3,000 mobile phones since January.
The prison system in Alabama recently saw riots where inmates took over a prison wing in a protest about the overcrowding and inhumane conditions inside one of their facilities.
Prison officers have also been attacked with one being killed after a stabbing.
.