Mexican prison riot

At least 20 people have been killed during a riot at a prison in the Mexican border city of Ciudad Juarez.



Officials said many other people were injured as prisoners fought with knives and set fire to cell blocks.



Rival drugs gangs have been battling for control of Ciudad Juarez, where more than 2, 000 people have been killed over the past year.



The government has already deployed more than 1, 500 troops in the city.



Chihuahua State Police spokesman, Carlos Gonzalez, told the Associated Press that a fight broke out between three different gangs in the early hours of the morning.



Television footage reportedly showed brown smoke coming from the windows of the prison buildings as helicopters hovered overhead.



Soldiers and police wearing riot gear later regained control of the prison, located in the desert outside the city.