| Cieneguillas prison riots | |
|---|---|
 The prison on 1 January 2020 | |
| Date | 31 December 2019, 2 January 2020 |
| Location | Cieneguillas Prison, Zacatecas, Mexico 22°45′46″N 102°40′16″W / 22.76278°N 102.67111°W |
| Caused by | Cartel war |
| Casualties | |
| Death(s) | 17 |
| Injuries | 10 |
Two prison riots occurred at the Cieneguillas Regional Center for Social Reintegration in Cieneguillas, Zacatecas, Mexico. The first was on 31 December 2019, and the second on 2 January 2020. Sixteen inmates were killed on 31 December, and another inmate was killed on 2 January.