A riot inside a prison in the southern Mexican state of Tabasco left seven inmates dead, prompting family members to try to break inside to check on their relatives.
Four police officers and six other prisoners were injured in the incident that occurred in the town of Villahermosa on Thursday.
BBC Latin America correspondent Will Grant examines what happened when the Mexican president announced an investigation into the riots.
The video was produced by Ottilie Mitchell, Ian Casey and Sunil Asar.
