Ten people were killed and over a dozen injured after a fight broke out at a prison in Mexico’s Sinaloa state on Thursday, the local government said.

The Sinaloa Public Security Secretariat said on X that “a brawl occurred inside the prison facilities,” without providing further details on what led to the violence.

A surge of dozens of security forces were able to restore control, with an AFP reporter witnessing the arrival of an armored vehicle and ambulances.

Sinaloa’s Secretary of Public Security, Sinuhe Tellez, said in a video posted on social media that “nine inmates and a minor who was visiting lost their lives, and 16 inmates were injured.”

Sinaloa state in northwest Mexico has become a battleground for warring factions of the Sinaloa drug trafficking cartel.

It is one of six Mexican states that the US State Department advises Americans not to travel to due to security concerns.