Two inmates have thus far been declared dead and thirteen others injured after two days of violence bat a Mexican prison in Cadereyta.
The riots were sparked after protest against new X-ray machines used on women entering the jail went awry with prisoners setting mattresses ablaze in demonstrations.
According to state security spokesman Aldo Fasci Zuazua, the X-ray machines were deployed after guards detained two women who tried to enter the jail with drugs hidden on them.
Fasci said about 40 inmates began protesting by blocking the corridors with blazing mattresses to prevent the passage of guards
The prisoners also complained that they were being deprived of food and water.
Last week, 29 inmates escaped to their freedom from a jail in Tamaulipas, Mexico after fleeing prison through a 40-meter-long tunnel believed to have taken several months to build.
According to reports, the escape took place about midnight last through a 40-meter-long tunnel five meters underground with 10 inmates of the Tamaulipas prison reported to have been recaptured.