Toronto police raided a cluster of apartment buildings in the city's west end as part of a human trafficking investigation.
Dozens of officers filtered through the buildings on Chalkfarm Drive, near Jane Street and Wilson Avenue, before dawn on Thursday.
Police said the sex crimes unit raided the buildings, acting on several search warrants, but would not provide further details.
Officers were called in from other divisionsand units to aid in the investigation.
Several people were seen being taken into custody, but police have not said exactly how many people were arrested, or what charges had been laid.
Toronto Police Const. Victor Kwong told media that police made arrests at another location nearby on Falstaff Avenue.
Police had planned to update the media at a news conference on Thursday morning, but said in a message posted on Twitter that the conference would be postponed indefinitely.
Police said that further investigation was needed before an update could be provided.
The warrants were not connected to an ongoing RCMP investigation into a Canada-wide prostitution ring, police said.
