The device was made from a plastic base, to which nails were attached to stand straight up. It measured 40 mm x 40 mm x 40 mm.
"It was purposely concealed with grass and placed in a busy foot traffic area," Dennis Hwang of the Richmond RCMP said in a statement.
"It’s the safety of the people and pets that use this area that concerns us. If you come across any similar traps in any schools or parks, please contact police. Do not remove or disturb the trap."