A childhood friend of Melissa Reid received a frantic message from her before being arrest in Per, the Daily Mirror reports.
Melissa's friend Rebecca Hughes says she received a Facebook message from Melissa a few days after she disappeared from the flat they shared in Ibiza saying: "I can't back out now, they will kill me."
Miss Hughes tried to persuade Melissa to go to the police, but she refused as it would endanger her life, according to her friend.
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."