Story highlights McArthur is charged with five counts of first-degree murder

Remains were recovered from planters at properties in Toronto

(CNN) Toronto police have arrested a landscaper who they say killed men and buried their body parts in potted plants on the properties where he worked.

Bruce McArthur, 66, is charged with five murders. Authorities expect the number of victims to go up.

"We do believe there are more and I have no idea how many more there are going to be," homicide detective Sgt. Hank Idsinga told reporters Monday.

Police have identified more than 30 properties where McArthur worked and urged his past clients to come forward.

Initially, investigators thought the victims were all from the Gay Village , a neighborhood in Toronto known for its predominantly gay population. But new evidence is expanding the victim profile, Idsinga said.

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