Intense fighting has erupted in the Mexican city of Culiacán, where masked gunmen threw up burning barricades and traded gunfire with security forces after authorities arrested one of the sons of the jailed former leader of the Sinaloa drug cartel Joaquín 'El Chapo' Guzmán. The chaotic scenes in Culiacán, a long-time stronghold for the Guzmáns' cartel, have increased pressure on President López Obrador, who took office in December promising to pacify a country weary after more than a decade of drug-war fighting.
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