At least 13 people have been killed after a fight broke out in a prison in northern Mexico. <br />A protest by inmates overnight had spiralled out of control, one prisoner was killed and a number of guards were taken hostage.<br />Police were sent in to calm the disturbance but the fight soon escalated to involve around 250 inmates.<br /><br />Anxious family members gathered outside the prison during the day waiting for news of their loved ones.<br /><br />Rival gangs that are involved in drug trafficking, human smuggling and extortion have fueled bloody battles in Mexico’s overcrowded prisons.<br />At least 28 inmates were killed in July in a battle in a prison in the Pacific resort of Acapulco.<br />
