Police are looking for the cartridge to a Taser-brand electronic control device.
Either late on Monday night or in the early hours of Tuesday morning, the cartridge and its pouch came off of an officer's service duty belt while the officer was on duty in downtown Winnipeg, police say.
The cartridge contains probes on wires, which extend when the device is discharged. Police say the cartridge could possibly harm someone, because if someone were to pick it up and carry it in a pocket, a build-up of static energy could activate the cartridge.
Officers would like anyone who finds the cartridge or its case to contact police immediately.
Police have advised the public about four other electronic control device cartridges lost this year.
