A prison riot in Mexico has left at least 13 inmates dead, however the death toll could rise according to a state official.
Aldo Fasci, a spokesman for the prison, said eight people who were in the prison in Cadereyta are now in a critical condition.
It is claimed the riot started on Monday night (October 9) due to a gang protesting and although this situation had calmed down through the night, a further fight on Tuesday morning (October 10) caused tensions to rise again.
Negotiations between authorities and prisoners went on for several hours, ABC reported.
However police ended up taking the decision that potentially lethal force was the only way to protect the lives of both prisoners and officers, according to Fasci.
He said this was because authorities knew one prisoner was already dead and some prison officers had been taken hostage.
The spokesman added: "If they had not taken these decisions right now we would be talking about many more dead."
It is not yet clear how many died as a result of other prisoners or police, but two are understood to have sustained bullet wounds.
During the violence smoke could be seen rising from the prison as many relatives watched from outside, looking for information about the prisoners.
Fasci claims it's hard to keep the inmates in order as there are 4,000 of them but only 300 prison officers, in a prison not designed for that capacity.