4 men, ranging in age from 23 to 43, are in custody on dozens of charges, including armed sexual assault, break and enter and robbery.
Police say the men are suspects in a series of violent crimes in the greater Montreal area, dating back to the beginning of March.
Clayton Roach, Vincent Parent-Lévesque, Yossi Avadov and James Craigwell had been under police surveillance for several days and were arrested as they were allegedly about to commit a robbery.
The men return to court April 28 for a bail hearing.
With files from CTV Montreal