BOGOTA - Suspected Colombian drug trafficker Luis Enrique Calle has surrendered to US drug enforcement officials in Panama, Colombia's defense minister said on Thursday.

"These criminals have no option. The pressure by the security forces leaves them no room and that's why they end up handing themselves in," Colombian Defense Minister Juan Carlos Pinzon told a press conference in Bogota.

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Calle, 36, is considered the leader of "Los Rastrojos" (The Leftovers), a violent criminal network that controls some smuggling routes and sends several tonnes of cocaine to the United States annually.

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