Toronto police will provide more details Friday about Project Sizzle, a major gun and drug raid that led to 20 people being arrested. The raids, carried out in the Fort York area and Etobicoke shortly before sunrise on Thursday, led to the arrest of several suspects wanted in connection with local homicides, police said. In all, heavily-armed officers and K9 units stormed 30 locations.

Toronto police spokesperson Mark Pugash said police believe the arrests will have a “significant impact in reducing crime in the city.”

The force’s integrated gun and gang task force led the investigation, but also received help from 10 other Ontario police services during the investigation, police said.

Several arrests were also made in Montreal.

Police Chief Mark Saunders is set to release more details about the arrests at a 10:30 a.m. ET news conference.