BUENOS AIRES, Argentina — The brutal torture and murder of two young women and a girl, broadcast live on Instagram, rocked Argentina on Thursday, where investigators suspect punishment killings by narco bosses.

On Wednesday, the bodies of Morena Verri, 20, Brenda Del Castillo, 20, and Lara Morena Gutierrez, 15, were found at a property in a southern suburb of Buenos Aires.

They were tortured and murdered live on Instagram, in a broadcast watched by 45 members of a private account, the security minister for Buenos Aires province, Javier Alonso, told a press conference on Wednesday evening.

Alonso said that four people were arrested over the murders but local media reported Thursday that the number had risen to 12.

The victims had been missing for five days.

Alonso said that they were l

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