The Sinaloa Public Security Secretariat said on Thursday that a fight inside the prison left nine inmates and a family visitor dead. Sinaloa's Secretary of Public Security, Sinuhe Tellez, said in a video posted on social media that the visitor was a minor.
The 16 injured inmates were taken for medical care, the secretariat added. An inter-institutional group of security forces responded, and authorities now have the prison "under control," with officials remaining at the site. Social work staff are contacting the families of the deceased, Tellez said. Visits to the prison have been suspended as a precaution, and the rest of the prison population is safe.
Sinaloa is a battleground for warring factions of the Sinaloa drug cartel and is one of six Mexican states the US State Department advises Americans not to visit due to security concerns. Officials have not said whether the violence at the prison was linked to that conflict.