NASHVILLE, TN (WSMV) -- The Tennessee Department of Correction launched investigations in 14 prisons and disciplined 70 inmates following a report by WRCB's affiliate, WSMV, that showed inmates using drugs and partying behind bars and showing it off on Facebook.

The Channel 4 I-Team found more than 100 inmates operating Facebook pages from behind bars - posting photos and videos of convicted criminals claiming to be using drugs, flashing large amounts of cash, partying, hoarding snacks and, in one case, setting a shirt on fire inside a prison cell.

The discovery of the Facebook pages raises real questions for correction officials, because inmates don't have Internet access and cell phones are prohibited.

The Channel 4 I-Team found many of the inmates who are enjoying Facebook, communicating with family and friends and sharing pictures are convicted murderers and rapists.

Read more from our NBC affiliate WSMV.