"These sudden and successive deaths in the custody of CBSA (Canada Border Services Agency) are troubling," Monia Mazigh, director of the International Civil Liberties Monitoring Group, said in a statement yesterday.
The CBSA reported the deaths of two persons at Toronto area detention facilities, but gave no cause of death or other details.
According to the ICLMG, Francisco Javier Romero Astorga, from Chile, was found Sunday "in his cell without vital signs."
A week earlier, Melkioro Gahungu of Burundi, committed suicide, according to unnamed sources cited by the rights groups.
"The circumstances of these deaths are shrouded in secrecy and to our knowledge no one has been held accountable," said Mazigh, who called for a government investigation.