At least eight inmates of a prison in Mexico's central state of Jalisco have died following a violent clash on Friday.
Officials added that some died from bullet wounds while others were beaten to death.
Eight more prisoners have been hospitalised with minor injuries.
Authorities said a fight broke out as inmates participated in a sports activity.
Jail staff have recovered two firearms and a homemade explosive device, and detained five people for their alleged role in the incident.


Trump says US military strike killed leader of Venezuela's Tren de Aragua gang
US and Iran signal a peace deal is close
Qatar rejects media report on energy production decisions
Trump says Iran war deal close as Strait of Hormuz tensions linger
Victims' families mark Air India crash anniversary with prayers and tributes
Ebola outbreak spreads to crowded displacement camp in Congo
Fire breaks out at New Zealand's Wellington airport, disrupting flights
Ukraine and Russia trade overnight drone strikes, officials say
