Guatemalan prison riots kill 31

AP, Guatemala City
Near-simultaneous attacks and riots at seven Guatemalan prisons that left 31 inmates dead show the organisational power of Central America's gangs, whose members communicate between prisons through cell phones and visitors, officials said.

The violence began with two grenade explosions at a makeshift prison for gang members and apparently coordinated attacks by Mara Salvatrucha gang members against the rival MS-18 gang at other prisons, Interior Minister Carlos Vielmann and Escuintla Gov. Luis Munoz said.

Rival gang members fought bloody clashes with guns and knives before the violence was brought under control.