Street artist Watchavato, for example, tags the walls of Mexico City with stencil prints of Jesus Malverde, the patron saint of drug dealers.

BBC: Narco-tourism in Mexico City

Honduran authorities said the gold-plated rifle had an engraving associated with the Malverde drug gang - which is allegedly connected to Mexico's Zetas cartel.

BBC: Gold-plated AK-47 assault rifle

Oscar Hagelsieb, assistant special agent in charge for Homeland Security Investigations in El Paso, said agents have found that most members of the Gulf and Zeta Cartels mainly pray to Santa Muerte while those from the Sinaloa and Sonora Cartels honor folk saint Jesus Malverde.

WSJ: Underworld saint becoming more popular in US