The incidents are being called "suspicious deaths" by the US embassy in Bogotá.
It warned of the risk of dating apps used by local criminals to entrap and drug victims.
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Several of the victims had been using online dating apps, prompting authorities to warn of the risk of meeting strangers online.
The US embassy describes a pattern where criminals exploit dating apps to lure victims to hotels, restaurants, and bars, where the odorless drug can be easily slipped into a drink.
Persons:
—, Ger Xiong, Andrés Nieto
Organizations:
Service, BBC, Guardian, Statistics, Tourism Observatory
Locations:
Colombian, Medellín, Bogotá, Colombia, American, Minnesota