There has been an armed prisoner’s escape in Mexico. Officials say, 13 convicts were freed by unidentified attackers who stormed the jail close to the border with the United States on Friday. <br/><br/>Witnesses say, a convoy of ten vehicles drove into the compound of the jail. Heavily armed gunmen then opened fire on the prison guards and forced their way into the prison cells. Three inmates were killed as the attackers escaped with the convicts in involved in serious crimes.