Ethan Guo, 19, had been documenting his attempt to fly solo to all seven continents on social media. He is no longer in custody but has no easy way to leave an island off Antarctica’s coast.

A 19-year-old pilot from the United States has been detained on an Antarctic island and charged by Chilean authorities, who say his flight to the frozen continent was unauthorized.

Ethan Guo, a 19-year-old aviator from Memphis, was detained and charged with submitting a false flight plan before traversing towards the South Pole on June 28, the Magallanes and Chilean Antarctic Prosecutor’s Office. Guo is aiming to raise $1 million for cancer research with his high-flying campaign across the globe.