At 7 am on 1 January 2023, a gang arrived in several armored vehicles at the Cereso number 3 state prison in Juárez, where they opened fire on guards, while prisoners inside rioted.[1] Ten guards, seven inmates, and two gunmen were killed,[2] while 13 other people were wounded, and four were arrested. At least 30 inmates escaped, including the leader of the Los Mexicles gang, Ernesto Alfredo Piñón de la Cruz, who is believed to be behind a wave of killings in August 2022 known as "Black Thursday", in which 10 people were killed.[1][3]
On 3 January, a shootout between gunmen and state investigators who were hunting the escapees resulted in five gunmen and two investigators being killed.[3] Piñón de la Cruz was killed in a subsequent shootout with law enforcement in the early hours of 5 January.[4]