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Three people have been arrested at OR Tambo International Airport for being in possession of cocaine valued at R770 000.
Police said a 34-year-old Colombian was arrested on Monday.
Spokesperson, Tummi Shai, said this followed the arrest on Saturday of a man from Argentina who was found with cocaine - and the arrest of an Angolan who arrived from Brazil on Sunday.
All three suspects, who do not appear to be linked, have appeared in court where they were remanded in custody.
