Bomb disposal experts and police were called to a house in west Belfast after customised buttons on a video games controller were apparently confused for bullets.
A large security operation was launched on Tuesday night and the property cordoned off as searches were carried out in the Sliabh Dubh Lane. It followed a report that a number of rounds of ammunition had been discovered at an unoccupied house.
Further searches were carried out yesterday and a number of items removed by police for examination. Police sources said the suspected bullets were subsequently found to be imitation rounds used as buttons on Xbox 360 controllers.
A PSNI spokesman confirmed: "A number of items that were taken away have now been examined and declared to be not suspicious."