Mexican security forces briefly captured one of the sons of El Chapo on Thursday but then released him after authorities came under attack by heavily armed drug cartels. Ovidio Guzmán López, a leader of the powerful Sinaloa Cartel, was detained in the city of Culiacán during a routine police check. But then members of his cartel responded by laying siege to the city, overwhelming the police and Mexican National Guard. Fighting raged for hours. At least two people died. The Mexican police eventually withdrew and released Guzmán. At least 20 prisoners also escaped during the chaotic day.