Advocacy groups backing the so-called suicide capsule said on Sunday that they have halted the process of taking applications to use the capsule, which numbered over 370 applicants last month - as a criminal investigation into its first use in Switzerland is completed, AP reported.

Florian Willet, the president of Switzerland-based, The Last Resort is being kept in pretrial custody, according to the group of Exit International, an affiliate founded in Australia more than 25 years ago.