Thunder Bay Police seized drugs at calls on Pearl Street and the area of Algoma Street South and Wilson Street.
Officers broke up an attempted home takeover on Wednesday on Pearl Street, where they found what is believed to be cocaine, along with cash and drug trafficking paraphernalia.
A 38-year-old woman and 40-year-old man were arrested.
On Thursday morning, a 25-year-old man was allegedly caught by officers not following court ordered conditions to remain at a specific residence.
Police seized drug-related items, cash, and what was believed to be cocaine from the man.
All three suspects face future court appearances.