Melissa Reid and Michaela McCollum have been taken to a taken to a detention centre in the Peruvian capital of Lima.
The pair arrived from court to a media scrum and were followed by Melissa's father William in another car. It is unclear whether they have been formally charged.
Melissa Reid and Michaela McCollum appeared in court in Lima, but it is unclear whether they have been charged, their lawyer said.
Two women accused of smuggling 12kg of cocaine into Peru could face up to three years in custody and a maximum of 25 years in prison.
A British woman accused of drug trafficking in Peru said she and her friend "were not smuggling for money, we were smuggling for our lives."