A riot at a prison in the southern Mexican state of Tabasco left seven people dead, prompting family members to try to break in to see their loved ones.
Four police officers and six other detainees were injured in the incident which broke out on Thursday in the town of Villahermosa.
BBC Latin America correspondent Will Grant examines what happened when Mexico's president announced an investigation into the riots.
Video produced by Ottilie Mitchell, Ian Casey and Suneil Asar.
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