The man suffered serious burns when a group of prisoners set fire to an administrative building, a warehouse and other facilities. The riot, involving around 50 inmates, broke out in Prison No. 6 on the city's outskirts late on Tuesday.
According to recent reports, 25 inmates were injured, two seriously. Three prison guards received slight injuries.
An investigation into the incident is underway.
The prison has over 2,000 inmates, of which around 700 are serving sentences of more than 15 years.