A riot and a fire at a prison near Monterrey in northern Mexico has left 52 people dead, state officials say.

Another 12 were injured in the riot at Topo Chico jail that broke out just after midnight.

Smoke was seen billowing from the complex but officials in Nuevo Leon state say the situation is now under control and no inmates have escaped.

Crowds of people worried about relatives inside the jail blocked roads outside, demanding information.

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