A MAC-10 submachine gun, ammunition and drugs were seized as part of a Toronto police investigation. Four Montreal residents are now facing charges. (Toronto Police Service)

An investigation by Toronto police has led to the arrest of four Montreal residents and the seizure of a submachine gun, ammunition and a cache of drugs.

Police said the investigation by 52 Division’s Major Crime Unit began on Oct. 2. As a result, a MAC-10 submachine gun and a quantity of ammunition and drugs were seized.

Investigators said that even more drugs and cash were seized when officers executed a search warrant at an unidentified location.

Four Montreal residents, whose ages range from 18 to 20 years old, have been charged as a result.

Tommy Giroux-Chevalier, 20, MC Koeurn Joseph, 20, Jahmeel Jean Pierre, 18, and Juliette Duchesne, 18, are all facing a number of charges including possession of a Schedule I substance for the purposes of trafficking and possession of proceeds of property or thing obtained by crime not exceeding $5000.

All four suspects are scheduled to appear in a Toronto courtroom on Monday.

Anyone with information relating to the investigation is asked to contact police directly or anonymously through Crime Stoppers.