Waterloo Regional Police arrested six people and seized drugs, weapons and money while raiding three homes in the area on Wednesday.
Police say officers searched a home on Highland Road in Kitchener, a second on Karn Street in Kitchener, and a third on Columbia Street in Waterloo.
They seized fentanyl, methamphetamine, psilocybin, prescription pills, weapons, ammunition, suspected stolen identity documents and around $7,500.
They also arrested four people from Kitchener: a 37-year-old woman; two men aged 36 and 26; and a 16-year-old.
They also arrested a 43-year-old man from Waterloo and a 24-year-old man from Cambridge.