The remains of at least six people have been recovered from plant pots in the grounds of a property connected to a suspected Canadian serial killer.

Police in Toronto made the grisly discovery at the home of Bruce McArthur, who was charged in January with the murder of five men near Toronto’s Gay Village.

Investigators had previously uncovered the remains of three people in flowers pots on a property where the 66-year-old stored his tools.

The most recent find was discovered in large flower planters at a residential property where he worked and stored his landscaping equipment.

Detective Sergeant Hank Idsinga said some of the remains included Andrew Kinsman, one of the five men which Mr McArthur has already been charged with murdering.

Authorities have said McCarthur had an arrangement with the home’s elderly residents to store his landscaping equipment there in return for caring for their garden.

Investigators are still trying to determine who the other alleged victims are from the property.

He has also been charged with the first-degree murder of Salim Esen, 44, Majeed Kayhan, 58, Andrew Kinsman, 49, Soroush Madmudi, 50 and Dean Lisowick, 47.

Selim Essen, Sorush Mahmudi, Dean Lisowick, Andrew Kinsman and Majeed Kayhan (from left to right) AP (AP)

Residents have been allowed to return to their homes, but investigators will continue to search for more remains.

However, freezing winter temperatures meaning it could take longer than a week to dig the area out.