Niagara Regional Police have made drug-related arrests at the St. Catharines apartment where three men were shot in September.

Four Toronto men were arrested Wednesday just after 3 p.m. at 193 Church St. after police received a search warrant for Apartment 4.

The NRP said officers from the street crime unit and the guns, gangs and grows unit began an investigation in August into the sale of illicit drugs from a residence in the area of Niagara and Church streets.

On Sept. 6, police responded to shots fired in the area that sent three people to hospital. Police said the shooting was the result of an altercation that had taken place inside the apartment.

Since then, police said officers have continued to investigate the apartment for drug trafficking and observed numerous activities consistent with a drug trafficking operation being run inside.

Emergency task unit members executed the search warrant Wednesday and the four men from Toronto were arrested without incident.

Police said they seized 112 grams of cocaine and crack cocaine, 7.5 grams of fentanyl powder and 1.2 grams of crystal meth with an estimated street value of $13,500 and seized $1,800 in Canadian and U.S. currency.

Marc Owusu-Boamah, 22; Jevaughn Salmon, 20, and Kadeem Richards, 20, were each charged with three counts of possession for the purpose of trafficking, possession of proceeds of crime under $5,000 and breach of probation.

Owusu-Boamah was further charged with failing to comply with a recognizance.

Daylin Young-Clark, 20, was charged with four counts of possession for the purpose of trafficking and possession of proceeds of crime under $5,000.